Distinguish between interphase interkinesis. and cytokinesis.
What events that occur during prophase I have a major impact on the survival of the species?
A diploid organism has 14 chromosomes in its somatic cells. What is the total number of combinations of chromosomes that the organism can produce in its gametes, assuming no cross occur? ____. (enter numeric answer below)
Would you expect to observe crossing over in the male 23rd pair of chromosomes? Explain.
Which cell shown here represents a diploid cell?A. A onlyB. B onlyC. Both A and BD. Neither A nor B
Physically, what are different alleles?A. Different alleles are different DNA sequences found at the same locus on homologous chromosomes.B. Different alleles are defferent DNA sequences found at the same locus on sister chromatids.C. Different alleles are different particles found in gametes.D. Different alleles are different phenotypes for a particular character.
The A and B genes are on nonhomologous chromosomes. A zygote is formed by the fusion of a sperm with genotype AB and an egg with the genotype ab. The zygote develops into a male. Which of the following are genotypes of sperm that could be produced by this male?A. AB and ab onlyB. AB, ab, Ab, and aBC. only ABD. only abE. aB and Ab only
A crossover has occurred in the bivalent shown below:What is the outcome of this single-crossover event? If a second crossover occurs somewhere between A and C, explain which two chromatids it would involve and where it occurs (i.e. between which two genes to produce the types of chromosomes shown here:A. A B C, A b C, a B c, and a b cB. A b c, A b c, a B C, and a B CC. A B c, A b c, a B C, and a b CD. A B C, A B C, a b c, and a b c
The red European squirrel has 12 pairs of large, long chromosomes. The grey squirrel has 20 pairs of smaller, shorter chromosomes. What do you expect to be the chromosome number in somatic tissued of a red/grey squirrel hybrid?A. 16B. 13C. 20D. 32
A hybrid allotetraploid plant (4n=60) was backcrossed to one of the suspected parents (2n=30). WHen the F1 underwent meiosis, the prophase chromosome configuration (where you see synapsis/pairing of homlogs) was examined under a microscope. What would you expect the chromosome configuration to look like?A. 45 singlesB. 15 pairs and 15 singlesC. 30 pairs and 15 singlesD. 60 singlesE. 30 pairs
You have isolated a single cell from a diploid organism. Which of the following would indicate that the cell was at metaphase of meiosis I and NOT metaphase of meiosis II?A. All the chromosomes were composed of one chromatid.B. It has a metaphase plate.C. Homologous chromosomes were present.D. All the chromosomes were composed of two chromatids.E. There was only one copy of ech type of chromosome.
What process creates diploid cells from haploid cells?
Where is the specific location in an animal where cells are undergoing Meiosis? In a Plant?
A cell containing 24 chromosomes at the start of meiosis would at its completion produce cells containing:A. 96 chromosomesB. 24 chromosomesC. 12 chromosomesD. 48 chromosomes
In sexually reproducing organisms, meiosis generates haploid (1n) gamete cells from diploid (2n) cells. The n represents the number of chromosomes in a cell's set of chromosomes. Haploid cells have one set of chromosomes, where diploid cells have two sets of chromosomes.How does a zygote form from gametes?A. Two haploid gametes combine to produce a diploid zygote that can develop into an embryo.B. Each haploid gamete replicates its set of chromosomes to produce a diploid zygote.C. A haploid zygote forms from the gamete with the strongest alleles and the other gametes die.D. The four gametes fuse into a zygote with a twice as many sets of chromosomes as a diploid cell.
At the end of meiosis, daughter cells are produced whose chromosomes are:A. haploidB. diploidC. non-homologousD. Both A and CE. Both B and C
The figure below shows four cells (A-D) that are undergoing meiosis. Match each cell to the phase of meiosis that it is currently in.A. InterphaseB. Prophase IC. Metaphase ID. Anaphase IIE. Metaphase IIF. Anaphase IG. Telophase IIH. Telophase I
Explain the difference between homologues and sister chromatids.
Compare and contrast Meiosis I with Meiosis II. Identify 2 similarities and 2 differences between Meiosis I and Meiosis II.
Cell Cycle control Identify the three cell cycle check points and recognize the specific importance and role of each for the progression of the cell cycle. Compare and contrast the behavior of normal and cancer cells as it relates to cell density anchorage to surfaces, mortality versus indefinite reproduction, and cell cycle control.