In an organism with 52 chromosomes, how many bivalents would be expected to form during meiosis?

1

During interphase of the cell cycle, ________.A) DNA recombines B) sister chromatids move to opposite polesC) the nuclear membrane disappearsD) RNA replicates

E) DNA content essentially doubles

2

If a typical somatic cell has 64 chromosomes, how many chromosomes are expected in each gamete of that organism?A) 8B) 16 C) 32D) 64

E) 128

3

In an organism with 52 chromosomes, how many bivalents would be expected to form during meiosis? A) 13B) 26C) 52D) 104

E) 208

4

For the purposes of this question, assume that a G1 somatic cell nucleus in a female Myrmecia pilosula contains 2 picograms of DNA. How much DNA would be expected in a metaphase I cell of a female?A) 16 picogramsB) 32 picogramsC) 8 picogramsD) 4 picograms

E) Not enough information is provided to answer the question

5

An interesting group of ants consists of several virtually identical, closely related species, with females having chromosome numbers of 18, 20, 32, 48, 60, 62, and 64. If one crossed a female of species (A) with 32 chromosomes and a male species (B) with 9 chromosomes (males are haploid, and each gamete contains the n complement), how many chromosomes would one expect in the body (somatic) cells of the female offspring? A) 4.5B) 9C) 25D) 32

E) 41

6

What is the outcome of synapsis, a significant event in meiosis?A) side-by-side alignment of nonhomologous chromosomesB) dyad formationC) monad movement to opposite polesD) side-by-side alignment of homologous chromosomes

E) chiasma segregation

7

In a healthy male, how many sperm cells would be expected to form from (a) 400 primary spermatocytes? (b) 400 secondary spermatocytes? A) (a) 800; (b) 800B) (a) 1600; (b) 1600C) (a) 1600; (b) 800D) (a) 400; (b) 400

E) (a) 100; (b) 800

8

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?A) 200; 50B) 100; 50C) 200; 300D) 100; 100

E) 50; 50

9

If a typical G1 nucleus is 2n and contains 2C (two complements) of DNA, a prophase I cell is 2n and contains 4C of DNA

10

S phase is the part of interphase when DNA duplication takes place.

11

The centromere of a chromosome separates during anaphase.

12

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

13

If a typical G1 nucleus contains 2C (two complements) of DNA, a gamete that is haploid (n) contains 1C of DNA

14

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

15

A bivalent at pachytene contains four chromatids

16

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

17

An organism with a haploid number of 10 will produce 1024 combinations of chromosomes at the end of meiosis.

18

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

6) In a diploid organism of 2n=10, assume that you can label all the centromeres derived from both female and male parent. When this organism produces gametes, how many male- and female- labeled centromere combinations are possible in the gametes?