The diagrams below show two different scenarios for a pair of
... In each scenario, the cell containing the tetrad is about to undergo a meiotic division. The four chromosomes are labeled 1 through 4 in the diagrams. ...
... In each scenario, the cell containing the tetrad is about to undergo a meiotic division. The four chromosomes are labeled 1 through 4 in the diagrams. ...
Ch 15: Chromosomal Basis of Inheritance
... Errors with meiotic spindle • Meiosis I: Homologous tetrad doesn’t separate OR • Meiosis II: Sister chromatids don’t separate Some gametes receive two of the same type of chromosome and another gamete receives no copy ...
... Errors with meiotic spindle • Meiosis I: Homologous tetrad doesn’t separate OR • Meiosis II: Sister chromatids don’t separate Some gametes receive two of the same type of chromosome and another gamete receives no copy ...
Gene Linkage and Polygenic Traits
... phenotypic ratio of offspring of dihybrid crosses involving unlinked autosomal genes Mendel’s law of Independent assortment states that inheritance of one trait does not influence the inheritance of other traits – only true if genes are on different chromosomes or far apart on the same chromosome ...
... phenotypic ratio of offspring of dihybrid crosses involving unlinked autosomal genes Mendel’s law of Independent assortment states that inheritance of one trait does not influence the inheritance of other traits – only true if genes are on different chromosomes or far apart on the same chromosome ...
UPDATED Cell Mitosis Lab
... 1. To indicate that you have a pair of homologous chromosomes, both gummy worms will be the same color. Explain what the color represents, in terms of what it is for in the body. Students can get creative with this – pick a trait for chromosomes to represent (brown hair, blue eyes, widows peak, etc. ...
... 1. To indicate that you have a pair of homologous chromosomes, both gummy worms will be the same color. Explain what the color represents, in terms of what it is for in the body. Students can get creative with this – pick a trait for chromosomes to represent (brown hair, blue eyes, widows peak, etc. ...
Updated Semester Two Review Sheet Answer Key
... 25. Researchers are studying slider turtles. Slider turtles hatch on the beach. The researchers discovered that larger baby turtles were more likely to survive than smaller baby turtles. They hypothesized that the larger turtles could move more quickly toward the water than the smaller turtles, redu ...
... 25. Researchers are studying slider turtles. Slider turtles hatch on the beach. The researchers discovered that larger baby turtles were more likely to survive than smaller baby turtles. They hypothesized that the larger turtles could move more quickly toward the water than the smaller turtles, redu ...
Name
... E. none of the answers are correct 10. In human blood groups, the fact that an individual can have an AB blood type is an example of ___________. A. incomplete dominance B. blending C. heterozygote advantage D. temperature-sensitive conditional allele E. codominance 11. Sickle-cell anemia in humans ...
... E. none of the answers are correct 10. In human blood groups, the fact that an individual can have an AB blood type is an example of ___________. A. incomplete dominance B. blending C. heterozygote advantage D. temperature-sensitive conditional allele E. codominance 11. Sickle-cell anemia in humans ...
will also include “toos of science” from chapter 1
... 15. An enzyme can be a catalyst. What does this mean? (page 51) 16. What is an enzyme-substrate complex? (page 52) 17. Why do enzymes work on only one substrate? 18. What are three conditions that destroy(denature) and enzyme? (page 53) 19. What would happen if enzymes are placed in a cold environme ...
... 15. An enzyme can be a catalyst. What does this mean? (page 51) 16. What is an enzyme-substrate complex? (page 52) 17. Why do enzymes work on only one substrate? 18. What are three conditions that destroy(denature) and enzyme? (page 53) 19. What would happen if enzymes are placed in a cold environme ...
14-1 PowerPoint
... The genes located on the X and Y chromosomes show a pattern of inheritance called sex-linked. A sex-linked gene is a gene located on a sex chromosome. Genes on the Y chromosome are found only in males and are passed directly from father to son. Genes located on the X chromosome are found in both sex ...
... The genes located on the X and Y chromosomes show a pattern of inheritance called sex-linked. A sex-linked gene is a gene located on a sex chromosome. Genes on the Y chromosome are found only in males and are passed directly from father to son. Genes located on the X chromosome are found in both sex ...
Section 4
... Chromosomes—strands of DNA and protein—contain the genes. genes are located in specific positions on chromosomes. Humans receive a set (23) of chromosomes from each parent. 23 chromosomes from mom these chromosomes + 23 chromosomes from dad are homologous 46 total chromosomes or 23 pairs A cell cont ...
... Chromosomes—strands of DNA and protein—contain the genes. genes are located in specific positions on chromosomes. Humans receive a set (23) of chromosomes from each parent. 23 chromosomes from mom these chromosomes + 23 chromosomes from dad are homologous 46 total chromosomes or 23 pairs A cell cont ...
Genes And Chromosomes
... a genome. Variations in chromosome number are mainly of two types, aneuploidy (heteroploidy), and euploidy (polyploidy). 1. Aneuploidy is the presence of chromosome number which is different than the multiple of the basic chromosome number. This type of variation involves one or a few chromosomes bu ...
... a genome. Variations in chromosome number are mainly of two types, aneuploidy (heteroploidy), and euploidy (polyploidy). 1. Aneuploidy is the presence of chromosome number which is different than the multiple of the basic chromosome number. This type of variation involves one or a few chromosomes bu ...
Document
... What is the genotype of a white-flowered pea plant? pp C. How is the product of meiosis different from that of mitosis? Meiosis produces 4 sex cells which have 1/2 the number (haploid) of chromosomes as compared to mitosis which makes 2 body cells with the diploid number of chromosomes that are iden ...
... What is the genotype of a white-flowered pea plant? pp C. How is the product of meiosis different from that of mitosis? Meiosis produces 4 sex cells which have 1/2 the number (haploid) of chromosomes as compared to mitosis which makes 2 body cells with the diploid number of chromosomes that are iden ...
Ch 11 Standards Test Practice
... for a boy with cystic fibrosis. The individual’s younger brother has also been diagnosed with cystic fibrosis. How would these brothers be represented in a pedigree? A Both would be represented as completely ...
... for a boy with cystic fibrosis. The individual’s younger brother has also been diagnosed with cystic fibrosis. How would these brothers be represented in a pedigree? A Both would be represented as completely ...
Cell Processes: CRCT Review Notes
... 6. Charles Darwin hypothesized that the island finches were descended from South American finches. The first finches on the islands may have been blown from South America by a storm. Over many generations, the finches may have evolved adaptations for the various island environments. 7. The process i ...
... 6. Charles Darwin hypothesized that the island finches were descended from South American finches. The first finches on the islands may have been blown from South America by a storm. Over many generations, the finches may have evolved adaptations for the various island environments. 7. The process i ...
Answers to Quiz 3:
... The problem is with Mr. Simpson, who is heterozygous for a pericentric inversion. A crossover within the inversion loop formed between the two chromosome six homologs in meiosis one will generate a chromosome with duplications and deficiencies. 6. The chromosome was derived from the father, due to a ...
... The problem is with Mr. Simpson, who is heterozygous for a pericentric inversion. A crossover within the inversion loop formed between the two chromosome six homologs in meiosis one will generate a chromosome with duplications and deficiencies. 6. The chromosome was derived from the father, due to a ...
A very large amount of genetic variation exists in the human
... maternal in origin. In turn, only one member of each pair is handed on through the reproductive cell (egg or sperm) to each child. Thus, each egg or sperm has only 23 chromosomes, the haploid number; fusion of egg and sperm at fertilization will restore the double, or diploid, chromosome number of 4 ...
... maternal in origin. In turn, only one member of each pair is handed on through the reproductive cell (egg or sperm) to each child. Thus, each egg or sperm has only 23 chromosomes, the haploid number; fusion of egg and sperm at fertilization will restore the double, or diploid, chromosome number of 4 ...
Lesson Overview
... Because the white forelock trait is dominant, all the family members in the pedigree lacking this trait must have homozygous recessive alleles. One of the grandfather’s children lacks the white forelock trait, so the grandfather must be heterozygous for this trait. ...
... Because the white forelock trait is dominant, all the family members in the pedigree lacking this trait must have homozygous recessive alleles. One of the grandfather’s children lacks the white forelock trait, so the grandfather must be heterozygous for this trait. ...
Fly Meiosis hand out Meiosis Pipe Cleaner Activity GINGER
... have completed this activity you should understand how a diploid cell becomes four haploid cells. In addition, you should understand the steps involved in this process. You will use pipe cleaners to model the stages of meiosis and will take notes as you go along so that you will have something to st ...
... have completed this activity you should understand how a diploid cell becomes four haploid cells. In addition, you should understand the steps involved in this process. You will use pipe cleaners to model the stages of meiosis and will take notes as you go along so that you will have something to st ...
Chapter 5 DNA and Chromosomes
... Genes – the information-containing elements that determine the characteristics of a species as a whole and of the individuals within it. A gene is usually defined as a segment of DNA that contains the instructions for making a particular protein (or, in some cases, a set of closely related proteins) ...
... Genes – the information-containing elements that determine the characteristics of a species as a whole and of the individuals within it. A gene is usually defined as a segment of DNA that contains the instructions for making a particular protein (or, in some cases, a set of closely related proteins) ...
Mitosis
... holds sister chromatids together. Kinetochore Protein structure at the centromere to which spindle fibers attach. ...
... holds sister chromatids together. Kinetochore Protein structure at the centromere to which spindle fibers attach. ...
Sexual Reproduction and Meiosis Work
... _____ 23. homologous pair : chromosomes :: a. chromatid : chromosomes b. egg : gametes ...
... _____ 23. homologous pair : chromosomes :: a. chromatid : chromosomes b. egg : gametes ...
The Evolution of Developmental Patterns in Unicellular Protists
... (A) Acetabularia crenulata (left) and A. mediterranea (right). Each individual is a single cell. The rhizoid contains the nucleus. (B) Effect of exchanging nuclei between two species of Acetabularia. Nuclei were transplanted into enucleated rhizoid fragments.(more...) The formation of a cap is a com ...
... (A) Acetabularia crenulata (left) and A. mediterranea (right). Each individual is a single cell. The rhizoid contains the nucleus. (B) Effect of exchanging nuclei between two species of Acetabularia. Nuclei were transplanted into enucleated rhizoid fragments.(more...) The formation of a cap is a com ...
Unit: Reproduction and Growth
... - DNA is free flowing in the cytoplasm (called chromatin or hereditary material) - Because it is a single-celled organism (selfcontained), it goes through asexual reproduction o Cyanobacteria o Bacteria ...
... - DNA is free flowing in the cytoplasm (called chromatin or hereditary material) - Because it is a single-celled organism (selfcontained), it goes through asexual reproduction o Cyanobacteria o Bacteria ...
Name: ______/40 points TF:
... offspring from a mating between them. The larger chromosome is chromosome I, and the smaller chromosome is chromosome II. Remember that karyotypes are made using metaphase chromosomes, so each chromosome shown contains two sister chromatids, though they cannot be distinguished from one another, as t ...
... offspring from a mating between them. The larger chromosome is chromosome I, and the smaller chromosome is chromosome II. Remember that karyotypes are made using metaphase chromosomes, so each chromosome shown contains two sister chromatids, though they cannot be distinguished from one another, as t ...
Chapter 12
... work with fruit flies Drosophila & their white-eyed mutation. – Found that Drosophila had 4 pairs of chromosomes with 1 mismatched pair • Males XY • Females XX. – True for all mammals and most insects ...
... work with fruit flies Drosophila & their white-eyed mutation. – Found that Drosophila had 4 pairs of chromosomes with 1 mismatched pair • Males XY • Females XX. – True for all mammals and most insects ...
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).