Steven Has the Dominant Tongue Rolling Phenotype but He Does

question 24

Multiple Choice

Steven has the dominant tongue rolling phenotype but he does not know his genotype.His wife has the recessive non-tongue rolling trait.If their son can roll his tongue this means ________.

• A) Steven has a homozygous recessive genotype
• B) Steven has a heterozygous genotype
• C) Steven has a homozygous dominant genotype
• D) that it is impossible to tell Steven's genotype from this information alone

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Definitions:

Smegma

A whitish substance that can accumulate under the foreskin in males and in the female genital area, consisting of dead skin cells and other secretions.

Urethral Meatus

The external opening of the urethra, through which urine is expelled from the body.

Endometrium

The inner lining of the uterus, which thickens during the menstrual cycle in preparation for potential pregnancy and sheds during menstruation if pregnancy does not occur.

Epididymis

A long, coiled tube that stores and carries sperm from the testis.