If a trait is inherited in an autosomal recessive fashion, which of the following is not true?
A. Both sexes are equally affected.
B. The trait will not occur in offspring if one of the parents is homozygous dominant.
C. About one-fourth of the offspring of two heterozygotes will be affected.
D. The trait often appears in the progeny of unaffected parents.
E. Two affected individuals can have an unaffected child.
E
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Watson and Crick developed a model of DNA in which the two strands twist into the shape of a ________________.
A. circle B. helix C. double helix D. double pleated sheet
An epitope is ____
a. the antigen binding site of an antibody molecule b. found only in IgG and IgM c. part of an antigen that binds to a specific antibody d. too small to stimulate an immune response e. a complement protein that initiates lysis of target cells
Which of the following is a major function of the ovaries?
A. They manufacture the sex hormones, estrogen and progesterone. B. They comprise the canal through which babies are delivered. C. They are the organs directly responsible for a woman's orgasm. D. They hold and nourish the developing fetus.
Make up 65% of bone by mass. Consist mainly of tiny calcium phosphate crystals in and around collagen fibers. Responsible for hardness and resistance to compression.
What will be an ideal response?