Question

1.3 assessment
match each term on the left with the best description on the right. each description may
be used only once.

1. diploid
2. gamete
3. haploid
4. meiosis
5. fertilization

a. a sex cell
b. union of the egg and sperm
c. has a full set of chromosomes
d. process that produces haploid cells
e. has half the number of chromosomes

circle the letter of the best answer for questions 6 to 20.

1. what does the female parent contribute in sexual reproduction?

a. an egg
c. a zygote
b. a sperm
d. an ovary

1. where are sperm produced?

a. in the brain
c. in the testes
b. in the uterus
d. in the ovaries

1. how are eggs and sperm similar?

a. they are diploid cells.
c. they are produced by mitosis.
b. they are haploid cells.
d. they are produced by fertilization.

1. what is formed when a sperm fertilizes an egg?

a. a zygote
c. a haploid cell
b. a gamete
d. a homologous chromosome

1. the vancouver island marmot has 40 chromosomes in its body cells. how many

chromosomes would you expect a male marmot to have in its sperm cells?
a. 10 chromosomes
c. 40 chromosomes
b. 20 chromosomes
d. 80 chromosomes

Explanation:

• Question 6: In sexual reproduction, the female parent contributes an egg. A sperm is contributed by the male parent. A zygote is formed after fertilization. An ovary is the organ that produces eggs.
• Question 7: Sperm are produced in the testes. The brain is not involved in sperm production. The uterus is part of the female reproductive system. The ovaries produce eggs in females.
• Question 8: Eggs and sperm are haploid cells. Diploid cells have a full set of chromosomes. They are produced by meiosis, not mitosis. Fertilization is the process of their union.
• Question 9: When a sperm fertilizes an egg, a zygote is formed. A gamete is either an egg or a sperm. A haploid cell is what eggs and sperm are. A homologous chromosome is a pair of chromosomes.
• Question 10: Sperm cells are haploid. If the body cells have 40 chromosomes (diploid), then the sperm (haploid) will have half of that, which is 20 chromosomes.

Answer:

1. A. an egg
2. C. in the testes
3. B. They are haploid cells.
4. A. a zygote
5. B. 20 chromosomes