40 4 - 17) The disease presented in the pedigree above is due to a dominant alle

Question

40 4 - 17) The disease presented in the pedigree above is due to a dominant allele a) True b) False c) could be either dominant or recessive 18) The gene involved in the disease is on an autosomal chromosome. a) True b) False c) could be either X-linked or autosomal 19) What is the genotype of individual 2? a) Homozygous dominant b) Heterozygous c) Homozygous recessive d) Hemizygous dominant e) Hemizygous recessive 20) What is the genotype of individual 3? a) Homozygous dominant b) Heterozygous c) Homozygous recessive d) Hemizygous dominant e) Hemizygous recessive

Explanation / Answer

17 ) True

18 ) False

The disease is present in all generations and hence it is X - linked.

19) Homozygus recessesive

The individual is a female as she has one allele (a) from father and one from mother(a).ie aa allleles are same and she might be a carrier as the disease is skipping generations .disease not present in parental or her generation but her effected childrens ratio is more.

20) Heterozygous.

The individual is a male and has one allele(A) from father and one from mother(a). He is a dominant carrier .

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