In guinea pigs, black coats (B) are dominant to brown coats (b). A female guinea pig that is homozygous recessive for coat color mates with a male guinea pig that is heterozygous for coat color. What percentage of their offspring will have black coats? a. 0% b. 25% c. 50% d. 75% e. 100%
Answer all questions please.
In guinea pigs, black coats (B) are dominant to brown coats (b). A female guinea pig that is homozygous recessive for coat color mates with a male guinea pig that is heterozygous for coat color. What percentage of their offspring will have black coats?
a. |
0% |
|
b. |
25% |
|
c. |
50% |
|
d. |
75% |
|
e. |
100% |
In guinea pigs, black coats (B) are dominant to brown coats (b). A female guinea pig that is homozygous recessive for coat color mates with a male guinea pig that is heterozygous for coat color. What would be the genotypic ratio of the F1generation?
a. |
3BB: 1bb |
|
b. |
1BB: 2Bb: 1bb |
|
c. |
2BB: 1Bb: 1bb |
|
d. |
2BB: 2Bb |
|
e. |
2Bb: 2bb |
If two guinea pigs in the F1 generation described in the question above mated, at random, what would be the likelihood that they would produce an offspring with a black coat?
a. |
0% |
|
b. |
25% |
|
c. |
50% |
|
d. |
75% |
|
e. |
It is impossible to tell given the information provided |
Certain genes, such as the non-structural genes that produce rRNA, are unregulated and have essentially constant levels of gene expression (i.e., they are always "on"). These genes are described as being ___________________________.
a. |
Inducible |
|
b. |
Constitutive |
|
c. |
Elongated |
|
d. |
Repressible |
|
e. |
Spontaneous |
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