Biology 122, Spring 2014 Activities for the week of March 10
... G1>S checkpoint and the role of the retinoblastoma protein. Assignment 2. Write an essay describing the differences between oncogenes and tumor suppressor genes. Include in your essay explanations for why mutations in proto-oncogenes lead to tumor formation and why this can also be true for tumor su ...
... G1>S checkpoint and the role of the retinoblastoma protein. Assignment 2. Write an essay describing the differences between oncogenes and tumor suppressor genes. Include in your essay explanations for why mutations in proto-oncogenes lead to tumor formation and why this can also be true for tumor su ...
ReproductionRegentsReview
... Sexual reproduction produces offspring that have a combination of genes inherited from each parent’s specialized sex cells (gametes). Offspring are genetically unique. Sexual reproduction involves gametogenesis and fertilization. Gamete: sex cell, either a sperm or an egg, haploid (1n) Gametes have ...
... Sexual reproduction produces offspring that have a combination of genes inherited from each parent’s specialized sex cells (gametes). Offspring are genetically unique. Sexual reproduction involves gametogenesis and fertilization. Gamete: sex cell, either a sperm or an egg, haploid (1n) Gametes have ...
Meiosis: Pre Test - Gulf Coast State College
... The individual will have the characteristics of Down’s syndrome. ...
... The individual will have the characteristics of Down’s syndrome. ...
Genetics of Fishes
... Aquaculture - penreared Atlantic salmon may have inefficient feed transfer if energy is devoted to egg/sperm production Polyploid salmon may not mature - all feed into growth ...
... Aquaculture - penreared Atlantic salmon may have inefficient feed transfer if energy is devoted to egg/sperm production Polyploid salmon may not mature - all feed into growth ...
Chapte6and7Online
... ancestors are genetically uniform 6. fusion of an egg and sperm cell 8. cell that has only one copy of each chromosome 10. female gamete 11. all of an organism’s genetic material 13. sex cell; an egg or a sperm cell 15. cell that has two copies of each chromosome 17. form of nuclear division that di ...
... ancestors are genetically uniform 6. fusion of an egg and sperm cell 8. cell that has only one copy of each chromosome 10. female gamete 11. all of an organism’s genetic material 13. sex cell; an egg or a sperm cell 15. cell that has two copies of each chromosome 17. form of nuclear division that di ...
The Process of Meiosis
... • Alleles for a particular phenotype determine what characteristic an organism will express, as with the following example • Mendel’s law of independent assortment applies only to traits carried on different chromosomes, i.e. unlinked genes • Independent assortment occurs as a result of the alignmen ...
... • Alleles for a particular phenotype determine what characteristic an organism will express, as with the following example • Mendel’s law of independent assortment applies only to traits carried on different chromosomes, i.e. unlinked genes • Independent assortment occurs as a result of the alignmen ...
01 - wcusd15
... 9. Identifying Relationships Put the following in order of smallest to largest: chromosome, gene, and cell. _______________________________________________________________ _______________________________________________________________ 10. Applying Concepts A pea plant has purple flowers. What allel ...
... 9. Identifying Relationships Put the following in order of smallest to largest: chromosome, gene, and cell. _______________________________________________________________ _______________________________________________________________ 10. Applying Concepts A pea plant has purple flowers. What allel ...
Name - Hartland High School
... 18. Meiosis consists of ______ separate divisions known as __________________ and _________________. 19. Meiosis begins with one ____________ and by the end there are ______________________________. 20. These haploid cells are ______________. 21. When a sperm fertilizes an egg, the resulting cell is ...
... 18. Meiosis consists of ______ separate divisions known as __________________ and _________________. 19. Meiosis begins with one ____________ and by the end there are ______________________________. 20. These haploid cells are ______________. 21. When a sperm fertilizes an egg, the resulting cell is ...
Genes and Inheritance
... Genotype vs Phenotype Genotype is the complement of alleles for each of the genes inherited on chromosomes. ...
... Genotype vs Phenotype Genotype is the complement of alleles for each of the genes inherited on chromosomes. ...
Mendel and Meiosis
... Nondisjunction leading to polyploidy • When a gamete with an extra set of chromosomes is fertilized by a normal haploid gamete, the offspring has three sets of chromosomes and is triploid. ...
... Nondisjunction leading to polyploidy • When a gamete with an extra set of chromosomes is fertilized by a normal haploid gamete, the offspring has three sets of chromosomes and is triploid. ...
Meiosis
... Random Fertilization – sperm? So, possible combinations is squared (223 x 223 = 64 trillion) So???? Evolution………. ...
... Random Fertilization – sperm? So, possible combinations is squared (223 x 223 = 64 trillion) So???? Evolution………. ...
Oh! MEIOSIS
... • Cell division in which one DIPLOID CELL produces four HAPLOID CELLS called sex cells or gametes • Meiosis is reduction division; the cells produced contain half the number of chromosomes as before meiosis • Meiosis occurs in two steps. During meiosis I, the chromosome pairs are divided between the ...
... • Cell division in which one DIPLOID CELL produces four HAPLOID CELLS called sex cells or gametes • Meiosis is reduction division; the cells produced contain half the number of chromosomes as before meiosis • Meiosis occurs in two steps. During meiosis I, the chromosome pairs are divided between the ...
Chapter 6 “Chromosomes & Cell Reproduction”
... exact copies of DNA that make up each chromosome. Often called “sister chromatids”. ...
... exact copies of DNA that make up each chromosome. Often called “sister chromatids”. ...
Problem Set 2
... Chromosome analysis of A. schlenzae indicates that the species is diploid with two pairs of chromosomes, one long and one short. Simple genetic analysis indicates that the gene (R) that specifies the red spots is located on the long chromosome, and a gene (L) that specifies body length resides on th ...
... Chromosome analysis of A. schlenzae indicates that the species is diploid with two pairs of chromosomes, one long and one short. Simple genetic analysis indicates that the gene (R) that specifies the red spots is located on the long chromosome, and a gene (L) that specifies body length resides on th ...
Macroevolution
... – Humans and chimps diverged from a common ancestor about 5 mya. share about 98.7% of genes ...
... – Humans and chimps diverged from a common ancestor about 5 mya. share about 98.7% of genes ...
Use the first two meiosis diagrams to show independent assortment
... chromosome number in G0 = chromatid number at the end of S = chromosome number in somatic cells = chromosome number in gametes = 11. Explain the two differences between plant and animal cell division. ...
... chromosome number in G0 = chromatid number at the end of S = chromosome number in somatic cells = chromosome number in gametes = 11. Explain the two differences between plant and animal cell division. ...
MEIOSIS
... MEIOSIS II No DNA replication, so each cell’s chromo has 2 chromatids Metaphase II: 4 chromo line up in the center of each cell Anaphase II: the paired chromatids separate; each of the 4 daughter cells receives 4 chromatids w/ N-4 chromo each The amount of genetic material has been reduced ...
... MEIOSIS II No DNA replication, so each cell’s chromo has 2 chromatids Metaphase II: 4 chromo line up in the center of each cell Anaphase II: the paired chromatids separate; each of the 4 daughter cells receives 4 chromatids w/ N-4 chromo each The amount of genetic material has been reduced ...
Grade 9 Science - hrsbstaff.ednet.ns.ca
... 9) Draw a diagram of a flower at label with the following parts. Stigma, Style, Pistil, Stamen, Filament, Anther, Pollen, Petal, Sepal, Ovary, Ovum. b) For each part, describe how it is involved in sexual reproduction for flowering plants. ...
... 9) Draw a diagram of a flower at label with the following parts. Stigma, Style, Pistil, Stamen, Filament, Anther, Pollen, Petal, Sepal, Ovary, Ovum. b) For each part, describe how it is involved in sexual reproduction for flowering plants. ...
Chromosomes - TJ
... DNA is not so neatly organized as you saw in Figure 1. The chromosomes in a cell are not naturally found lined up next to one another. Scientists take a picture of chromosomes and then match them up by size, except the last two. The finished picture is called a karyotype, as you see in Figure 2. Chr ...
... DNA is not so neatly organized as you saw in Figure 1. The chromosomes in a cell are not naturally found lined up next to one another. Scientists take a picture of chromosomes and then match them up by size, except the last two. The finished picture is called a karyotype, as you see in Figure 2. Chr ...
Study Guide – Unit 6 Test: Genetics and DNA Name: Per: 1 2 3 4 5 6
... How many chromosomes are shown in a normal human karyotype? ...
... How many chromosomes are shown in a normal human karyotype? ...
Human Genome notes
... • In pedigrees, circles represent females and squares represent males • Symbols that are shaded indicates the individual expresses the trait • No shading means the trait is not exhibited • Important to understand that most traits are polygenic and also can be influenced by ...
... • In pedigrees, circles represent females and squares represent males • Symbols that are shaded indicates the individual expresses the trait • No shading means the trait is not exhibited • Important to understand that most traits are polygenic and also can be influenced by ...
Higher Human Biology Chapter 9 Questions
... What name is given to the process by which the nucleus of a normal body cell divides into 2 new daughter nuclei followed by the division of the cytoplasm to form two new daughter cells? ...
... What name is given to the process by which the nucleus of a normal body cell divides into 2 new daughter nuclei followed by the division of the cytoplasm to form two new daughter cells? ...
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).