genbio

Question 1

the nuclei of an egg and a sperm cell fuse, producing a

Answer 1

Zygote

Question 2

the production of offspring through the union of male and
female gametes

Answer 2

Sexual Reproduction

Question 3

Gametes have ___ the number of chromosomes present in the somatic cells (body cells)
of a species

Answer 3

HALF

Question 4

In humans and other animals, meiosis takes place in the primary reproductive organs –

Answer 4

gonads

Question 5

Meiosis in mature gonads of the male (testes) produces

Answer 5

spermatoza

Question 6

Meiosis in mature gonads of the female (ovaries) produces

Answer 6

ova

Question 7

the cellular mechanism of gamete formation

Answer 7

gametogenesis

Question 8

Replicated chromosomes (sister chromatids) fold and condense in the nucleus.

Answer 8

Prophase I

Question 9

The two chromosomes of each homologous pair undergo pairing (synapsis), forming
tetrads.

Answer 9

Prophase I

Question 10

Chromatids of homologous chromosomes physically exchange segments
(crossing-over).

Answer 10

Prophase I

Question 11

Sites where crossing-over has occurred are marked by thickened spots (crossovers or
chiasmata).

Answer 11

Prophase I

Question 12

The chromosomes condense, nuclear envelope breaks down, crossing over occurs

Answer 12

Prophase I

Question 13

Pairs of homologous chromosomes move to the equator of the cell

Answer 13

Metaphase I

Question 14

Homologous chromosomes move to the opposite poles of the cell

Answer 14

Anaphase I

Question 15

Chromosomes gather at the poles of the cells. The cytoplasm divides

Answer 15

Telophase I / Interkinesis