Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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The image shows a pair of homologous chromosomes from a single parent before gamete production. M1 and M2 are maternal chromosomes, while P1 and P2 are paternal chromosomes. Two traits are shown: D represents seed color (D – green, d – yellow), while F represents flower color (F – purple, f – white). These two traits follow the patterns of basic
During crossing-over between the M2 F allele and the P1 f allele, a mutation occurred and the portion of P1 did not reattach to the chromosome.
Which of the following explains what would happen to the proportion of white flowers in a population resulting from this mutation?
A - There would be an increase in the proportion of white flowers because the f allele is distributed to more gametes.
B - There would be a decrease in the proportion of white flowers because the f allele is not distributed to as many gametes.
C - There would be an increase in the proportion of white flowers because the f allele would not be masked by the dominant trait.
D - There would be a decrease in the proportion of white flowers because the resulting gametes would be heterozygous for purple flowers.
Transcribed Image Text:D
Crossing-Over
F
F
F
м, м,
Р, Р.
M,
M,
P, P.
Homologous Pairs
Gametes
D.
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