Don't understand the following about heredity.... 10 Points for the first one who answers!?

Question

1.)If a child has blond hair and both of her parents have brown hair, what does that tell you about the allele for bolnd hair? Explain.
2.)What is the genotype of a pea plant that is true-breeding for purple flowers?
3.) If you were a carrier of one allele for a certain recessive disorder, how could genetic counseling help you prepare for the future?

Answer 1

1. blonde hair is recessive. both parents carry the recessive allele, the blonde child (which would happen 1/4th of the time) received both of them.

2. PP - homozygous for the purple allele

3. Genetic counseling would help you determine if you would pass the recessive allele to your children. For example, if you were a carrier for a sex-linked gene and were female, then 50% of your sons would exhibit the disorder, and 50% of your daughters would be carriers.
If the disorder was not sex-linked, then genetic counseling would want the medical history of your spouse to see if he/she could also carrier the recessive allele. Then the genetic counselor would consult with you both on the probability of your child having the disease or being a carrier.

Answer 2

See wikipedia article on Heredity.

Answer 3

1. Tells you that blonde hair is recessive, Eg if blonde is b and brown is B, her parents must both be Bb and she must be bb.

Answer 4

1: Hair color comes from your mothers parents
2: sweet(guess)
3:keep you from reproducing

Answer 5

You should have said " the first correct answer " ! But then how would you know if the answer is correct ?