Exam 2: Mitosis and Meiosis

Name two evolutionarily significant benefits of meiosis that are not present in mitosis.

If a typical somatic cell has 64 chromosomes, how many chromosomes are expected in each gamete of that organism?

A chromosome may contain one or two chromatids in different phases of the mitotic or meiotic cell cycle.

When cells withdraw from the continuous cell cycle and enter a "quiescent" phase, which stage are they said to be in?

The house fly, Musca domestica, has a haploid chromosome number of 6. How many chromatids should be present in a diploid, somatic, metaphase cell?

Homologous chromosomes can be matched by their similar structure and function within a nucleus. Which chromosomes making up a genome do not follow the same characteristics of homology?

The diploid chromosome number of an organism is usually represented as 2n. Humans have a diploid chromosome number of 46. What would be the expected haploid chromosome number in a human?

How many haploid sets of chromosomes are present in a diploid individual cell with a chromosome number of 46? 32?

After which meiotic stage (meiosis I or II) would one expect monads to be formed?

List four terms used to describe the normal morphologies, with respect to arm ratio, of eukaryotic chromosomes.

The meiotic cell cycle involves two cell divisions but only one DNA replication.

List in order of occurrence the phases of mitosis.

In a healthy male, how many sperm cells would be expected to form from (a) 400 primary spermatocytes? (b) 400 secondary spermatocytes?

Name two cellular organelles, each having genetic material, that are involved in either photosynthesis or respiration.

An organism with a diploid chromosome number of 46 will produce 223 combinations of chromosomes at the end of meiosis.

The accompanying sketch depicts a cell from an organism in which 2n = 2 and each chromosome is metacentric. a() Circle the correct stage for the cell in this sketch: anaphase of mitosis anaphase of meiosis I anaphase of meiosis II telophase of mitosis b() Given that each G1 nucleus from this organism contains 16 picograms of DNA, how many picograms of chromosomal DNA would you expect in the cell shown here?

During meiosis, chromosome number reduction takes place in anaphase II.

In a healthy female, how many secondary oocytes would be expected to form from 100 primary oocytes? How many first polar bodies would be expected from 100 primary oocytes?

How many haploid sets of chromosomes are present in an individual cell that is tetraploid (4n)?

List, in order of appearance, all the cell types expected to be formed during (a) spermatogenesis and (b) oogenesis.