Genetics Pretest

Practice Problems Set 1 ( Mitosis, Meiosis, Cell Cycle)

1. In the somatic cells of an animal cell 30 pairs of homologous chromosomes are present. How many chromosomes will be found in a mature egg?

a. 15

b. 30

c. 45

d. 60

e. 120

2. In the somatic cells of an animal with 30 pairs of homologous chromosomes, how many chromosomes will be found in a secondary oocyte?

a. 15

b. 30

c. 45

d. 60

e. 120

3. In a cell with 30 pairs of homologous chromosomes how many chromosomes will be found in a primary spermatocyte?

a. 15

b. 30

c. 45

d. 60

e. 120

4. If there are 16 tetrads at metaphase I what is the diploid number of the organism?

a. 32

b. 16

c. 64

d. 8

5. An individual has the genotype AaBB . The gamete types that could be produced are:

a. Aa

b. BB

c. AB

d. Ab

e. more than one of the choices is correct

f. none of the choices is correct

6. Following the 2n rule which of how many different gametes can be produced from the genotype AaBbCcDd ee Ff Gg?

a. 16

b. 32

c. 5

d. 64

7. A single daughter cell at G1 after mitosis would have the same amount of DNA as the precursor daughter cell.

a. True

b. False

8. Haploid unreplicated chromosomes are present during:

a. metaphase I

b. metaphase II

c. mitosis

d. prophase II

e. none of the choices is correct

9. Chiasmata are observed during:

a. leptotene

b. zygotene

c. pachytene

d. diplotene

e. diakenesis

10. 2n = 38 means:

a. a cell has 38 pairs of homologs

b. a cell has 38 total chromosomes

c. at S phase a cell will have 76 pairs

d. there are 19 pairs when the...