Unit 1 - Multiple Choice

Question 1

When does a cell replicate its DNA?

a) G1 phase of Interphase
b) Metaphase
c) S phase of Interphase
d) Early Prophase

Answer 1

c) S phase of Interphase

Question 2

Which of the following pairs are not identical?

a) Homologous chromosomes
b) Sister chromatids
c) Daughter Cells
d) all of the above

Answer 2

a) Homologous chromosomes

Question 3

What is the haploid number (n) in humans?

a) 23
b) 46
c) 92
d) none of the above

Answer 3

a) 23

Question 4

What is required to clone an animal from an adult cell?

a) Nucleated egg cell
b) nucleus from an adult cell
c) an adult female to serve as a surrogate
d) all of the above

Answer 4

d) all of the above

Question 5

What condition results from a trisomy of chromosome 18?

a) Down’s syndrome
b) Turner’s syndrome
c) Edward’s syndrome
d) none of the above

Answer 5

c) Edward’s syndrome

Question 6

Which of the following genotypes will give rise to a dominate phenotype?

i) HH ii) Hh iii) hh
a) i
b) ii, iii
c) i, ii, iii
d) i, ii

Answer 6

d) i, ii

Question 7

A female carrier for cystic fibrosis mates with a normal male. What is the percent chance that an offspring of their swill have cystitis fibrosis?

a) 25%
b) 10%
c) 5%
d) 0%

Answer 7

d) 0%

Question 8

What does a dark square represent on a pedigree?

a) affected male
b) affected female
c) unaffected male
d) unaffected female

Answer 8

a) affected male

Question 9

What will be the genotypic ratio of the F1 generation be if you were to breed a homozygous dominant with a heterzyogous?

a) 3:1
b) 1:1
c) 1:2:1
d) none of the above

Answer 9

b) 1:1

Question 10

How does the practice of hybridization differ from inbreeding?

a) hybridization involved two unrelated parents
b) hybridization is a method of selecting for certain phenotypes
c) hybridization cannot be used except with plants
d) none of the above

Answer 10

a) hybridization involved two unrelated parents