Exam 3: Cell Division and Chromosome Heredity

What process is used to make mature germ- line cells, or GAMETES?

The number of occurrences of which event correlates closely with the number of recombination nodules along each homologous chromosome arm?

While female and male beetles both contain twenty diploid chromosomes, males have one smaller chromosome than in females. What can be inferred from this observation?

A dihybrid has the genotype AaBb. After a normal mitotic division into two daughters cells, one daughter cell will have the genotype__________ and the other will have the genotype _______.

What is the role of the centromere during cell division?

How many total CHROMATIDS are found in a human somatic cell nucleus during G2 phase?

How many CHROMOSOMES are found in a human somatic cell nucleus?

During which phase of the cell cycle does the cell initiate replication of its nuclear DNA?

After which stage or phase of the cell cycle does cytokinesis occur?

Gametes and some species are known as _________because of the n number of chromosomes contained in their nuclei.

Which organelle migrates during M phase to form the two opposite poles of the dividing cell and acts as the source of the spindle fiber microtubules?

During meiosis I, when does homologous chromosome pairing and recombination occur?

An individual is heterozygous for a gene at a specific locus._________ will have the same form of alleles at that locus after S phase.

What is the mammalian transcription factor that elicits a cascade of gene transcription and developmental events that ultimately produce male internal and external structures?

A eukaryotic cell is diploid and contains 6 chromosomes during G1 phase. If the cell undergoes mitosis, how many daughter cells would be produced, and how many chromosomes would each one contain?

Describe how Mendel's two laws are illustrated by the movement of chromosomes in meiosis.

The biological sex of birds and some other mammals can be explained by females containing _________chromosomes and males containing__________chromosomes.

Describe how microtubules and cohesion work together to align the chromosomes along the metaphase plate during the process of sister chromatid cohesion.

Biological sex in some species, such as Drosophila, is determined by genes present on both the_________ .

WT yeast (TRP+) can synthesize the amino acid tryptophan and can grow on media plates lacking tryptophan. In contrast, mutant alleles (trp-) block tryptophan synthesis and result in an inability of mutant strains to grow on media lacking tryptophan. A diploid yeast was made through the cross M ADE+ × MATa ade-. Meiosis was induced in the diploid strain to produce an ascus with four haploid spores, which were separated and grown on plates lacking tryptophan. How many spores are expec grow into colonies on the plate?