Respuesta :
Answer:
1. Option A
2. 0%
Explanation:
A) Given Curly hair is dominant over straight hair.
Let the allele representing straight hair be "c"
and the allele representing curly hair be "C"
a) a woman heterozygous for hair curl, a man heterozygous for hair curl will
Cc * Cc
CC, Cc, Cc, cc
75 % curly and 25 % straight hairs
Hence, option A is correct
B) TT * Tt
When TT or Tt is crossed with tt, not all offspring will be tall
In order that all offspring are tall , the probability that both the parents must be homozygous recessive is 0%
In humans, curly hair is dominant over straight hair so, the correct answer is A woman for hair curl, a man for hair curl will produce 25\% hair, 75% curly hair.
Using C as the allele for hair curl: Cc x Cc will the following genotypes: CC, Cc, Cc, cc25\% will be purebred dominant (curly hair)50% will be (curly hair)25% will be recessive (hair) combine with the curly hair genotypes since the question asked about phenotypes which result in 75% curly and 25\% straight.
What is an impure breed?
If the 2 are different, you've got got a genotype for that gene. For example, being for hair color should suggest you've got one allele for purple hair and one allele for brown hair. The courting among the 2 alleles influences which tendencies are expressed.
Thus it is clear that a woman for hair curl and a man for hair curl will produce 25% hair, and 75% curly hair.
To know more about genotype refer to the link :https://brainly.com/question/26671097