Can someone help me with a few of these Biology questions?

Question

1. In human genetics, the abnormal trait
(a) may be recessive or dominant.
(b) Is always recessive
(c) is always dominant
(d) is always found in the parents, if it's present in the progeny
(e) is never found in the parents, if it's present in the progeny

2. Human albinism is due to the inability to synthesize the dark pigment melanin. Albinism is a recessive trait. These facts suggest that...
(a) two functional alleles are needed to make melanin.
(b) two dominant alleles are needed to make melanin.
(c) only one functional allele is needed to make melanin
(d) two recessive alleles are needed to make melanin.
(e) one recessive and one dominant allele are needed to make melanin

3. A father is heterozygous for the Rh-antigen gene. The mother is homozygous recessive. These parents are concerned that an embryo with Rh+ blood will be attacked by the immune system of the mother. What is the probability that an embryo they conceive will be Rh+?
0.10, 0.20, 0.25, 0.50, or 0.75..

Answer 1

1. B
2. C
3. 0.50

Answer 2

1) its either b or d , because mutant genes always have to occur in the parents first , then the kids . Mutant genes are recessive
2) only one allele needs to be dominant ,so c
3) i think its 50% because he can produce 2 gametes, and she can only produce one . im assuming that Rh is dominant

Answer 3

Hmm, are you sure that you do not know how to do this question?

Isn't this MCQ?

1)a
2)d
3) 0.50( using the square method)
Homozygous recessive= same type but not dominant.
I think you should do it yourself , then you will understand.

Answer 4

1-a 2-d? check 3- 25 % sorry i wasn't possitive, been a few years..lAT Justin

Answer 5

1 a
2 e
3 50%

chem major. my best guesses

Answer 6

1. a
2. c
3. .5

Answer 7

Google would be better someone here.