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Genetics Problems If the dominant allele K is necessary for hearing, and the dominant allele M results in deafness no matter
2. A tall pea plant is crossed with a recessive dwarf pea plant. What will the phenotypic and genotypic ratio of offspring be
Genetics Problems If the dominant allele K is necessary for hearing, and the dominant allele M results in deafness no matter what alleles are present, what percentage of the offspring produced by the cross kkMm x Kkmm will be deaf?
2. A tall pea plant is crossed with a recessive dwarf pea plant. What will the phenotypic and genotypic ratio of offspring be if The tall plant was TT? a. TX tt
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Answer #1

Question 1

kkMm X Kkmm

kM km kM km
Km KkMm Kkmm KkMm Kkmm
Km KkmM Kkmm KkmM Kkmm
km kkmM kkmm kkmM kkmm
km kkmM kkmm kkmM kkmm

Only genotypes which lead to deafness are:

kkMm, kkMM, KKMm, KkMm, KkMM, ( the question says no matter what alleles are present)

Percentage of offspring with deafness is : (8/16) X 100 = 50 %

QUESTION 2

Tall plant is TT , recessive dwarf would be tt

TT X tt

T T
t Tt Tt
t Tt Tt

Both phenotypic and genotypic ration would be 4.

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