Chapter 13: Q 13. (page 343)
By definition, a pericentric inversion includes the ________.
a. centromere
b. chiasma
c. telomere
d. synapse
The correct option is (a).
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X-linked recessive traits in humans (or in Drosophila) are observed ________.
a. in more males than females
b. in more females than males
c. in males and females equally
d. in different distributions depending on the trait
Which of the following statements is true? a. Recombination of the body color and red/cinnabar eye alleles will occur more frequently than recombination of the alleles for wing length and aristae length. b. Recombination of the body color and aristae length alleles will occur more frequently than recombination of red/brown eye alleles and the aristae length alleles. c. Recombination of the gray/black body color and long/short aristae alleles will not occur. d. Recombination of the red/brown eye and long/short aristae alleles will occur more frequently than recombination of the alleles for wing length and body color.
In agriculture, polyploid crops (like coffee, strawberries,or bananas) tend to produce ____.
a. more uniformity
b. more variety
c. larger yields
d. smaller yields
If the allele encoding polydactyly (six fingers) is
dominant why do most people have five fingers?
a. Genetic elements suppress the polydactyl gene.
b. Polydactyly is embryonic lethal.
c. The sixth finger is removed at birth.
d. The polydactyl allele is very rare in the human
population.
Assume a pericentric inversion occurred in one of two homologs prior to meiosis. The other homolog remains normal. During meiosis, what structure—if any—would these homologs assume in order to pair accurately along their lengths?
a. V formation
b. cruciform
c. loop
d. pairing would not be possible
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