Some Combinations of Recessive Alleles Cause Problems So Severe That

question 32

Multiple Choice

Some combinations of recessive alleles cause problems so severe that a may fetus cease to develop.Such lethal allele combinations appear to alter Mendelian ratios because

• A)carriers do not constitute a progeny class.
• B)they do not show a 1:2:1 genotypic ratio.
• C)homozygotes for the lethal allele do not appear as a progeny class.
• D)homozygotes for the lethal allele pass it on to half their offspring.

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Definitions:

Pelvic Examination

A physical exam of the female reproductive organs, conducted by a physician to check for signs of disease or other conditions.

Intrauterine Device

A form of long-acting reversible contraception that is inserted into the uterus to prevent pregnancy.

Mental Health

A state of well-being in which an individual realizes his or her own abilities, can cope with the normal stresses of life, can work productively, and is able to make a contribution to their community.