biology question 5?

Question

16) if an individual exhibits a recessive trait, which of the following statements must be correct?

a) any children this individual has will always exhibit the trait, regardless of the genotype of the other parent
b) this individual’s genotype is different from an individual with the dominant trait.
c) any siblings of this individual will have the same phenotype for this trait
d) both parents of this individual had the same genotype for this trait
e) this individual is heterozygous

17) a person who is heterozygous for the Huntington disease (HD) allele has offspring with someone who does not have HD. What proportion of their children are expected to have HD.

a) 1/12
b) 1/16
c)1/4
d) 1/8
e) 1/10

Answer 1

16. b) this individual’s genotype is different from an individual with the dominant trait.

17. 1/2 (Each child of an HD parent has a 50-50 chance of inheriting the HD gene.)

http://www.ninds.nih.gov/disorders/huntington/huntington.htm

Answer 2

16-b
17-1/2