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Home Q & A Board Biology-Related Homework Help Cell Biology
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smithers123 smithers123
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11 years ago
I know that to tell a pure dominant individual from a heterozygote, a test called a "backcross" is performed. In this, the individual that shows the dominant trait is crossed with a pure recessive. Explain why a pure recessive used in a backbone?
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#1
11 years ago
In a test cross, we know what the results SHOULD be if the individual is heterozygous.

Rr X rr
Rr 50% will be dominant trait
rr 50% will be recessive trait

if the individual is Homozygous
RR X rr
Rr 100% will be dominant
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