Multiple Choice
Crossing over, resulting in an increase in genetic variation, occurs between _____.
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4. Genetic Mapping and Linkage
Crossing Over and Recombinants
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Which of the following gametes can be formed from the genotype AaBb if AB and ab are linked?
A
AB, ab
B
Ab, aB
C
Aa, Bb
Verified step by step guidance1
Understand the concept of linked genes: Linked genes are located close to each other on the same chromosome and tend to be inherited together during meiosis.
Identify the genotype: The genotype given is AaBb, where 'A' and 'B' are dominant alleles, and 'a' and 'b' are recessive alleles.
Determine the linkage: Since AB and ab are linked, they are on the same chromosome and will be inherited together as a unit.
Consider the possible gametes: Due to the linkage, the gametes that can be formed are AB and ab, as these alleles are inherited together.
Recognize the recombination possibility: Although AB and ab are linked, recombination can occur, leading to the formation of Ab and aB gametes, but these are less frequent.
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