Answer the question using the accompanying figure. The figure shows the alleles present at an STR locus in two
adults and four juveniles. Which of the juvenile(s) could be offspring of the adults?
a. juvenile 2 only
b. juveniles 2 and 3
c. juveniles 1 and 4
d. juveniles 2 and 4
e. juveniles 1, 2, 3, and 4
ANSWER: d
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a. IVF b. GIFT c. IUI d. ZIFT e. ICSI
Which of the following designates a human male with Klinefelter’s Syndrome?
a. XXY b. XY c. XX d. XYY e. XO
Dosage compensation in mammals typically involves the random inactivation of one of the two X chromosomes relatively early in development. Such X chromosome inactivation often leads to phenotypic mosaicism
Assume that black fur in cats is due to the X-linked recessive gene b, whereas its dominant allele B produces yellow fur. A Bb heterozygote is a mosaic called "tortoise shell" or "calico." Using appropriate gene symbols, diagram a mating between a black male and a calico female. Give the phenotypes and genotypes of all the offspring.
An antibody consists of how many polypeptides?
A. Four B. Five C. Two D. Eight E. Six