Topic 2

Question 1

A structure composed of DNA and associated proteins that in total contain the genome of an organism. contains one DNA molecule in G1 phase, anaphase and telophase of mitosis, and anaphase II and telophase II of meiosis. contains 2 DNA molecules in G2 phase, prophase and metaphase of mitosis and meiosis.

Answer 1

chromosome

Question 2

structures originally created by chromosome replication during S phase that remain attached until anaphase of mitosis or anaphase II of meiosis

Answer 2

sister chromatids

Question 3

they synapse during meiosis and contain the same genes but not necessarily the same alleles

Answer 3

homologous chromosomes

Question 4

a specialized DNA sequence on eukaryotic chromosomes that is the site of microtubule binding during mitosis and meiosis

Answer 4

centromere

Question 5

a chromosome pair that differs between males and females.

Answer 5

sex chromosomes

Question 6

mechanism that ensures equal expression of x chromosome genes in males and females

Answer 6

dosage compensation

Question 7

used in drosophla as the mechanism that determines the direction of sexual development

Answer 7

x/autosome ration

Question 8

determines male sexual development in many mammals

Answer 8

SRY gene

Question 9

sex chromosomes in species where males have two copies of the sex chromosome and females have one of each

Answer 9

ZW sex chromosomes

Question 10

the identical products of a mitotic division

Answer 10

daughter cells

Question 11

homologous chromosomes segregate during

Answer 11

meiosis 1

Question 12

present in one gamete

Answer 12

haploid number of chromosomes