Crossing Over and Recombinants Video Lessons

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Problem: Which statement explains why the recombination frequency between two genes is always less than 50%? a) The genotype of the F1 gametes will always be 50% parental gametes and 50% recombinant gametes. b) Genes with a recombination frequency near 50% are unlinked and have an equal likelihood of being inherited together or separately. c) F1 gametes always have 50% of their alleles from each parental gamete. d) Recombination cannot be more than 50% because chromosomes are only 50% map units in length.

FREE Expert Solution

Recombination Frequency: probability of a cross-over between two genes on the same chromosome

: ranges from 0% to 50%

• 0% means the two genes are close together and are inherited together

• 50% means the two genes are far apart and will assort independently

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Problem Details

Which statement explains why the recombination frequency between two genes is always less than 50%? 

a) The genotype of the Fgametes will always be 50% parental gametes and 50% recombinant gametes. 

b) Genes with a recombination frequency near 50% are unlinked and have an equal likelihood of being inherited together or separately. 

c) F1 gametes always have 50% of their alleles from each parental gamete. 

d) Recombination cannot be more than 50% because chromosomes are only 50% map units in length.

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