Which of the following is true when analyzing a pedigree?

a. If a disorder is caused by a sex-linked trait, only male offspring will have the disorder.
b. If a disorder is caused by a dominant trait, two normal parents can produce an offspring with the disorder.
c. If a disorder is caused by a recessive trait, every offspring afflicted with the disorder will have a parent with the disorder.
d. If a disorder is caused by a recessive trait, the normal parents of every offspring with the disorder are carriers


Ans: d. If a disorder is caused by a recessive trait, the normal parents of every offspring with the disorder are carriers

Biology & Microbiology

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______________ twins result from a single fertilization event. Fill in the blank(s) with the appropriate word(s). Fill in the blank(s) with the appropriate word(s)

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