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Chapter 13: Q. 9 (page 343)
In agriculture, polyploid crops (like coffee, strawberries,or bananas) tend to produce ____.
a. more uniformity
b. more variety
c. larger yields
d. smaller yields
The Correct answer is c.
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Determine whether the function is one-to-one.
Assume a pericentric inversion occurred in one of two homologs prior to meiosis. The other homolog remains normal. During meiosis, what structure鈥攊f any鈥攚ould these homologs assume in order to pair accurately along their lengths?
a. V formation
b. cruciform
c. loop
d. pairing would not be possible
Abnormalities in the number of X chromosomes tends to have milder phenotypic effects than the same abnormalities in autosomes because of _______
a. deletions
b. nonhomologous recombination
c. synapsis
d. X inactivation
Which recombination frequency corresponds to independent assortment and the absence of linkage?
a. 0
b. 0.25
c. 0.50
d. 0.75
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.
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