The Rb gene is located at 13q14. This locus is on
A. the long arm of chromosome 14
B. the long arm of chromosome 13
C. the short arm of chromosome 14
D. the short arm of chromosome 13
Ans: B. the long arm of chromosome 13
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There are five antibody classes: __________, __________, __________, __________, and
__________. (Ig stands for __________.) Fill in the blank(s) with the appropriate word(s).
Fraternal twins
A. have exact copies of each other's DNA. B. are usually of opposite sex. C. are only as alike as any other siblings. D. will usually occur at the first pregnancy.
Where do the megaspores develop in pine trees?
a. within an ovule b. within a strobilus c. within a sporopollenin d. within a seed
In Mendel's pea plant experiments, in order for him to have observed a 3:1 phenotypic ratio in the F2 generation, which of the following must be true?
A) The pairs of alleles must be either homozygous dominant or homozygous recessive. B) Both alleles of a pair must go into each gamete together. C) Both of the F1 parents must be breed true. D) The two alleles of a pair separate in gamete formation.