Persons having an XO karyotype are sterile females. They have ____ syndrome
a. Turner
b. Klinefelter
c. Down (trisomy form)
d. Phenylketonuria
e. Down (translocation form)
a
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If both parents are "carriers" due to the presence of one copy of the Tay-Sachs allele, what are the odds that they would have a normal child?
a. 0 b. 25% c. 50% d. 75% e. 100%
Hemophilia is a sex-linked, recessive genetic disorder. If a woman who was a carrier for hemophilia married a man who had the disorder, which of the following is not true?
A. Female children would have a 50% chance of being hemophiliac. B. Male children would have a 50% chance of being hemophiliac. C. All male children would be hemophiliac. D. Female children would either have the disorder or be a carrier for the disorder.
In a flower, what is the ploidy of the
endosperm after fertilization?
a. haploid b. diploid c. triploid d. hexaploid e. octaploid
Which is a true statement regarding the size of PCR products?
A. Since the length of primers increases with each cycle, when PCR is completed, the majority of products are of various sizes. B. Since the number of DNA products ending exactly between both primers increases with each cycle, when PCR is completed, the majority of products are of similar size. C. Since the number of DNA products extends beyond each primer with each cycle, when PCR is completed, the majority of products are of various sizes. D. None of the choices are correct.