Question

Give the complementary DNA strand for the following:

ATC GCT AAT

(1 point)
Responses

ATC GCT AAT
ATC GCT AAT

UAG CGA UUA
UAG CGA UUA

TAG CGA TTA
TAG CGA TTA

GCT ATC GGC
GCT ATC GGC
Question 15
Brown eyes (B) are dominant over blue eyes (b). Which of the following would be homozygous dominant for brown eyes?(1 point)
Responses

BB
BB

b
b

B
B

bb
bb
Question 16
Which is the complementary mRNA strand from the following DNA template?

TTC AGC

(1 point)
Responses

AAG UCG
AAG UCG

AAG TCG
AAG TCG

CCT GAT
CCT GAT

CCU GAU
CCU GAU
Question 17
In pea plants, tall plants (T) are dominant over short plants (t). If a heterozygous tall pea plant is crossed with a homozygous recessive short pea plant, what percentage of the offspring is expected to be tall.

(HINT: use a Punnett square to help you with this question)

(1 point)
Responses

25%
25%

50%
50%

0%
0%

75%
75%
Question 18
If a black chicken (BB) is crossed with a white chicken (WW) and incomplete dominance is observed, what are the expected phenotypes of the offspring?(1 point)
Responses

All gray
All gray

All black
All black

All white
All white

All red
All red
Question 19
In cattle, coat color is controlled by codominant alleles. A red-coated cow (RR) is crossed with a white-coated bull (WW). What are the expected phenotypes of the offspring?(1 point)
Responses

All red coat
All red coat

All pink coat
All pink coat

All white coat
All white coat

Red and white coat

Answer 1

Here are the correct answers:

- Complementary DNA strand for ATC GCT AAT: TAG CGA TTA
- Q15 (homozygous dominant for brown eyes): BB
- Q16 (mRNA from DNA template TTC AGC): AAG UCG
- Q17 (Tt × tt → % tall offspring): 50%
- Q18 (BB × WW with incomplete dominance): All gray
- Q19 (RR × WW with codominance): Red and white coat