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(need good explanation with answer) 1) The family pedigree illustrated in pictur

ID: 28949 • Letter: #

Question

(need good explanation with answer)

1) The family pedigree illustrated in picture describes congenital cataracts in humans, which is a rare phenotype seen in humans. Squares = Males; Circles = females
Further pedigree analysis suggests this condition is not known in the family of No. 1 male of this pedigree.



This diagram indicates congenital cataracts are inherited as a/an ______. Furthermore, the No.2 female must be _____ in order for this pedigree to occur. Person 5 in the second generation marries a man who does not have cataracts. Two of their four children, a boy and a girl, develop cataracts. What is the probability that their next child will be a girl with cataracts?


A. Autosomal dominant; heterozygous;

Explanation / Answer

B. Autosomal recessive; heterozygous; 1/2-correct answer