What Is the Most Likely Explanation for the Expression of Responses

question 19

Multiple Choice

What is the most likely explanation for the expression of responses related to pleiotropy?

• A)The same gene may have more than one chromosome locus.
• B)The protein coded for by the single gene is an important component of more than one tissue.
• C)The silencing of a gene allele inherited from one parent is expressed differently depending on which parent contributed the silenced allele.
• D)The same disorder may have an autosomal-dominant inheritance pattern, an autosomal-recessive inheritance pattern, and an X-linked-recessive inheritance pattern.

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Definitions:

Identical Twins

Twins who originate from a single fertilized egg that splits and develops into two individuals with exactly the same genetic material.

Zygotes

The initial cell formed when a sperm fertilizes an egg, marking the beginning of human development.

Ovum

The female reproductive cell or egg that, when fertilized by a sperm, can develop into an embryo.

Monozygotic Twin

Identical twins that result from the splitting of a single fertilized egg, sharing the same genetic material.