Unit 7 Review
... 17. During metaphase 1 of meiosis… A. Centromeres of replicated chromosomes line up along the cell’s equator B. Centromeres divide as sister chromatids move toward opposite poles of the cell C. Homologous chromosome pairs lineup along the cell’s equator D. Homologous chromosomes move toward opposit ...
... 17. During metaphase 1 of meiosis… A. Centromeres of replicated chromosomes line up along the cell’s equator B. Centromeres divide as sister chromatids move toward opposite poles of the cell C. Homologous chromosome pairs lineup along the cell’s equator D. Homologous chromosomes move toward opposit ...
Study Guide for the LS
... Sex chromosomes: The X and Y Chromosomes that are responsible for determining an organism’s gender. XX= female XY= male Mitosis: is the process in which one cell copies its DNA and divides into two identical body cells that have the same number of chromosomes as the parent cell. (produces 2 iden ...
... Sex chromosomes: The X and Y Chromosomes that are responsible for determining an organism’s gender. XX= female XY= male Mitosis: is the process in which one cell copies its DNA and divides into two identical body cells that have the same number of chromosomes as the parent cell. (produces 2 iden ...
Meiosis
... The number of possible chromosome combinations in the haploid nuclei is potentially very large. In general, the number of possible chromosome combinations is 2n, where n is the number of chromosome pairs. For example, in fruit flies, which have 4 chromosome pairs, the number of possible combinations ...
... The number of possible chromosome combinations in the haploid nuclei is potentially very large. In general, the number of possible chromosome combinations is 2n, where n is the number of chromosome pairs. For example, in fruit flies, which have 4 chromosome pairs, the number of possible combinations ...
Lesson 15d Meiosis PPT - Educational Excellence
... daughter cells identical to parent cell (2n to 2n) • Meiosis results in genetic variation by shuffling of maternal and paternal chromosomes and crossing over. No daughter cells formed during meiosis are genetically identical to either mother or ...
... daughter cells identical to parent cell (2n to 2n) • Meiosis results in genetic variation by shuffling of maternal and paternal chromosomes and crossing over. No daughter cells formed during meiosis are genetically identical to either mother or ...
Ch 10 Genetics ~ Study Guide Name
... 20. What if he mates with another black heterozygous female…now what is the probability of having yellow furred pups? _________% Draw a Punnett Square to determine probability 21. Cells that produce body cells undergo a form of cell division called ____________. 22. Cells that produce gametes underg ...
... 20. What if he mates with another black heterozygous female…now what is the probability of having yellow furred pups? _________% Draw a Punnett Square to determine probability 21. Cells that produce body cells undergo a form of cell division called ____________. 22. Cells that produce gametes underg ...
ppt_Genetics1
... • An allele is the alternative forms of a gene eg B or b • Homozygous individuals have the same allele on both chromosomes eg BB or bb • Heterozygous individuals have different alleles on both chromosomes eg Bb ...
... • An allele is the alternative forms of a gene eg B or b • Homozygous individuals have the same allele on both chromosomes eg BB or bb • Heterozygous individuals have different alleles on both chromosomes eg Bb ...
Genetic Disorders
... don’t separate from each other then the gametes could end up with the wrong number of chromosomes If the egg has a wrong # of chromosomes and it gets fertilized, the zygote and every single cell after it begins to divide will have the wrong # of chromosomes ...
... don’t separate from each other then the gametes could end up with the wrong number of chromosomes If the egg has a wrong # of chromosomes and it gets fertilized, the zygote and every single cell after it begins to divide will have the wrong # of chromosomes ...
Chapter Notes
... -Forms a helix structure (a twisted ladder). This structure was first described by Watson and Crick. When a cell is ready to divide, each strand of loosely coiled DNA folds up further into a compact, Xshaped structure called a chromosome. Chromosomes within the nucleus are found in pairs. Most human ...
... -Forms a helix structure (a twisted ladder). This structure was first described by Watson and Crick. When a cell is ready to divide, each strand of loosely coiled DNA folds up further into a compact, Xshaped structure called a chromosome. Chromosomes within the nucleus are found in pairs. Most human ...
File
... B. Cell makes copies of the DNA in the nucleus C. The stage when the cell divides D. “button like” structure that holds together the chromatins E. The stage when the cell prepares to divide F. Rod shaped structure of condensed chromatin that contains DNA G. Regular sequence of growth and division th ...
... B. Cell makes copies of the DNA in the nucleus C. The stage when the cell divides D. “button like” structure that holds together the chromatins E. The stage when the cell prepares to divide F. Rod shaped structure of condensed chromatin that contains DNA G. Regular sequence of growth and division th ...
Understanding DNA / Chromatin / Chromosomes
... Step 6) What do the terms diploid and haploid mean? What do the symbols n or 2n mean? Make sure you know this in class. You do not need to write anything into your packet unless you want to. For the next two questions, here is a reminder of how to draw DNA structures within a nucleus: Focus on the n ...
... Step 6) What do the terms diploid and haploid mean? What do the symbols n or 2n mean? Make sure you know this in class. You do not need to write anything into your packet unless you want to. For the next two questions, here is a reminder of how to draw DNA structures within a nucleus: Focus on the n ...
1 Inheritance 1
... Key terms If the alleles for a characteristic are the same, the organism is said to be homozygous for that characteristic. The organism is a homozygote. If the alleles for a characteristic are different, the organism is said to be heterozygous for that characteristic. The organism is a heterozygote ...
... Key terms If the alleles for a characteristic are the same, the organism is said to be homozygous for that characteristic. The organism is a homozygote. If the alleles for a characteristic are different, the organism is said to be heterozygous for that characteristic. The organism is a heterozygote ...
What do these 3 people have in common?
... They all have a genetic disorder called XYY syndrome, which resulted from each of them receiving an extra Y chromosome from his father. (normal male = XY) The XYY syndrome was previously considered the "supermale" syndrome where men with this condition were thought to be overly aggressive and more l ...
... They all have a genetic disorder called XYY syndrome, which resulted from each of them receiving an extra Y chromosome from his father. (normal male = XY) The XYY syndrome was previously considered the "supermale" syndrome where men with this condition were thought to be overly aggressive and more l ...
Mitosis & Meiosis PPT Pres
... Somatic cells (cells of the body) are diploid. This means that each cell has two chromosomes of each type. They are in PAIRS. Biologists use “2N” to symbolize diploid. Gamete cells (egg, sperm) are haploid. This means that each cell has only one of each type of chromosome. ...
... Somatic cells (cells of the body) are diploid. This means that each cell has two chromosomes of each type. They are in PAIRS. Biologists use “2N” to symbolize diploid. Gamete cells (egg, sperm) are haploid. This means that each cell has only one of each type of chromosome. ...
Section 1 Review
... The chemical colchicine is a “spindle poison” that interferes with the organization of the spindle apparatus. Somatic cells undergoing division in the presence of colchicine arrest at metaphase. Eventually the splitting of the centromeres that is characteristic of anaphase occurs, but cell division ...
... The chemical colchicine is a “spindle poison” that interferes with the organization of the spindle apparatus. Somatic cells undergoing division in the presence of colchicine arrest at metaphase. Eventually the splitting of the centromeres that is characteristic of anaphase occurs, but cell division ...
AP Bio Ch 10
... 3 basic patterns of sexual life cycles: animal - gametes are only haploid cells - meiosis results in gamete production - gametes don’t divide further before fertilization - fertilization produces a diploid zygote that divides by mitosis to produce a diploid multicellular animal fungi and some protis ...
... 3 basic patterns of sexual life cycles: animal - gametes are only haploid cells - meiosis results in gamete production - gametes don’t divide further before fertilization - fertilization produces a diploid zygote that divides by mitosis to produce a diploid multicellular animal fungi and some protis ...
Prophase II
... The random distribution of pairs of genes on different chromosomes to the gametes ...
... The random distribution of pairs of genes on different chromosomes to the gametes ...
Document
... 3) The cell then splits in two. 4) Part of each parent is carried to the two new cells. 5) Two EXACT daughter cells (same number of chromosomes) ...
... 3) The cell then splits in two. 4) Part of each parent is carried to the two new cells. 5) Two EXACT daughter cells (same number of chromosomes) ...
Chromosomes Notes Review
... 21. A section of DNA that provides information for a particular protein 22. The sex chromosomes that are only found in males For the following questions, determine which term below correctly matches. Some answers may have more than one answer. Autosomes Sex Chromosome 23. Determines the gender of th ...
... 21. A section of DNA that provides information for a particular protein 22. The sex chromosomes that are only found in males For the following questions, determine which term below correctly matches. Some answers may have more than one answer. Autosomes Sex Chromosome 23. Determines the gender of th ...
Human karyotype
... • No use unless you know the rules for using the information • DNA is organised (in chromosomes) • The expression of genes is regulated • These 2 lectures cover these 2 issues ...
... • No use unless you know the rules for using the information • DNA is organised (in chromosomes) • The expression of genes is regulated • These 2 lectures cover these 2 issues ...
Document
... The body cells of humans have 46 chromosomes that form 23 pairs. Chromosomes are made up of many genes joined together. You have 23 pairs of chromosome. Each chromosome has 200 – 3000 genes. Therefore, you have between 20,000 – 25,000 genes. Each gene controls a trait. About Chromosome 1 Chromosome ...
... The body cells of humans have 46 chromosomes that form 23 pairs. Chromosomes are made up of many genes joined together. You have 23 pairs of chromosome. Each chromosome has 200 – 3000 genes. Therefore, you have between 20,000 – 25,000 genes. Each gene controls a trait. About Chromosome 1 Chromosome ...
Circle True or False: If false, replace the underlined word to
... This is a picture of a mosquito’s chomosomes. In mosquitos, long noses are dominant over short noses. If this mosquito has a short nose, what is its genotype? (Use the letter “g” when writing the genotype) (1 pt) The trait for nose length is found on chromosome 3, label the genotype on this picture. ...
... This is a picture of a mosquito’s chomosomes. In mosquitos, long noses are dominant over short noses. If this mosquito has a short nose, what is its genotype? (Use the letter “g” when writing the genotype) (1 pt) The trait for nose length is found on chromosome 3, label the genotype on this picture. ...
BIOL 1406 chapter 13 assessment: Modern Understanding of
... 7.Which of the following statements about nondisjunction is true? Nondisjunction only results in gametes with n+1 or n-1 chromosomes Nondisjunction occurring during meiosis II results in 50% normal gametes Nondisjunction during meiosis I results in 50% normal gametes. Nondisjunction always results i ...
... 7.Which of the following statements about nondisjunction is true? Nondisjunction only results in gametes with n+1 or n-1 chromosomes Nondisjunction occurring during meiosis II results in 50% normal gametes Nondisjunction during meiosis I results in 50% normal gametes. Nondisjunction always results i ...
Cross-dressing or Crossing-over: Sex Testing of Women
... A: These chromatids make up a diploid chromosome. B: The cell that contains these sister chromatids must be diploid. C: The sister chromatids were formed by replicating a single chromatid. D: The sister chromatids were joined by fertilization, bringing together a maternal and paternal chromatid. ...
... A: These chromatids make up a diploid chromosome. B: The cell that contains these sister chromatids must be diploid. C: The sister chromatids were formed by replicating a single chromatid. D: The sister chromatids were joined by fertilization, bringing together a maternal and paternal chromatid. ...
CHAPTER 10
... (d) List the possible genotypes and phenotypes for the kids. (e) What is the probability of kids with blonde hair? (f) What is the probability of kids with brown hair? 10. Explain how a person inherits a recessive disorder. 11. Explain how a person inherits a dominant disorder. 12. What is a pedigre ...
... (d) List the possible genotypes and phenotypes for the kids. (e) What is the probability of kids with blonde hair? (f) What is the probability of kids with brown hair? 10. Explain how a person inherits a recessive disorder. 11. Explain how a person inherits a dominant disorder. 12. What is a pedigre ...
cell-division-review-no-answers
... Indicate whether the statement is true or false. ____ 1. Each human somatic cell contains two copies of each chromosome for a total of 23 homologous chromosomes. ____ 2. Gametes are diploid so that when fertilization occurs, the resulting zygote will have the characteristic number of chromosomes for ...
... Indicate whether the statement is true or false. ____ 1. Each human somatic cell contains two copies of each chromosome for a total of 23 homologous chromosomes. ____ 2. Gametes are diploid so that when fertilization occurs, the resulting zygote will have the characteristic number of chromosomes for ...
Ploidy
Ploidy is the number of sets of chromosomes in a cell. Usually a gamete (sperm or egg, which fuse into a single cell during the fertilization phase of sexual reproduction) carries a full set of chromosomes that includes a single copy of each chromosome, as aneuploidy generally leads to severe genetic disease in the offspring. The gametic or haploid number (n) is the number of chromosomes in a gamete. Two gametes form a diploid zygote with twice this number (2n, the zygotic or diploid number) i.e. two copies of autosomal chromosomes. For humans, a diploid species, n = 23. A typical human somatic cell contains 46 chromosomes: 2 complete haploid sets, which make up 23 homologous chromosome pairs.Because chromosome number is generally reduced only by the specialized process of meiosis, the somatic cells of the body inherit and maintain the chromosome number of the zygote. However, in many situations somatic cells double their copy number by means of endoreduplication as an aspect of cellular differentiation. For example, the hearts of two-year-old children contain 85% diploid and 15% tetraploid nuclei, but by 12 years of age the proportions become approximately equal, and adults examined contained 27% diploid, 71% tetraploid and 2% octaploid nuclei.Cells are described according to the number of sets present (the ploidy level): monoploid (1 set), diploid (2 sets), triploid (3 sets), tetraploid (4 sets), pentaploid (5 sets), hexaploid (6 sets), heptaploid or septaploid (7 sets), etc. The generic term polyploid is frequently used to describe cells with three or more sets of chromosomes (triploid or higher ploidy).