Unit A Reproduction

7. Which structure breaks down in preparation for
cell division?
(a) A (b) B (c) C (d) D
8. Humans have 46 of these.
(a) A (b) B (c) D (d) E
9. A human egg cell has ? chromosomes.
(a) 46 (b) 24 (c) 48 (d) 23
10. Which hormones are the female sex hormones?
(a) testosterone and estrogen
(b) estrogen and progesterone
(c) progesterone and cortisone
(d) cortisone and estrogen
11. Use Figure 2 to answer the following questions.
A
C
Figure 2
(a) Name the stages and put them in the
correct order.
(b) Does the illustration show plant or animal
mitosis? Explain.
(c) Identify the stages that have sister
chromatids attached.
(d) Which stage of the cell cycle is missing?
B
D
12. Match the term on the left with the description on
the right.
Table 1
Term
Description
a) allele process that does not occur during meiosis
b) meiosis I diploid
c) chromosome process in which the sister chromatids
number stay together during metaphase
d) meiosis II one form of a gene
e) interphase process that creates four daughter cells
13. Give two examples of organisms that reproduce
by each of the following methods.
(a) seeds
(b) spores
(c) binary fission
(d) vegetatively
(e) fragmentation
(f) embryo developing in a uterus
14. Indicate whether each statement is true or false.
If you think that a statement is false, rewrite it to
make it true.
(a) DNA is composed of sugars, phosphates,
and nitrogenous bases.
(b) Humans have 23 chromosomes in each
somatic cell.
(c) Zygotes are diploid.
(d) Chromosomes replicate during metaphase.
(e) Gametes are diploid.
(f) DNA and RNA are only found in the nucleus.
(g) If the fertilized egg of a fruit fly has eight
chromosomes then the cells of the fruit
fly’s wings have four chromosomes.
(h) When plants such as potatoes reproduce
by creating tubers, they reproduce without
sex cells.
(i) Cancer cells divide at the same rate as
normal cells.
(j) Human egg cells have half as many
chromosomes as human sperm cells.
NEL
Unit A Review 145