36. A person who is homozygous recessive at a locus has which of the following?

Question

36. A person who is homozygous recessive at a locus has which of the following? a. two copies of the recessive allele b. two copies of the dominant allele c. an autosomal trisomy d. a recessive allele on the X chromosome only e. a recessive allele on the Y chromosome only 37. What is an individual's actual genetic make-up called? a. phenotype b. homozygosity c recessiveness d. phenotypic ratio e. genotype 38. Which of the following is not a polygenic trait? a. height b. skin color c. eye color d. ABO blood type e. hair color

Explanation / Answer

36ans-A-two copies of the recessive allele

when there are two copies of the recessive alleles ie homozygous recessive a recessive trait is only expressed (aa)

37 ans-e-genotype

it is genetic constitution of an individual

38 ans-D-ABO blood type

Polygenic traits are Human skin, hair, and eye color because they are influenced by more than one allele at different loci and Blood type is not a polygenetic trait because It involves one gene but with 3 alleles( i.e. A, B and O) and deal with appearance.

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