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Home Q & A Board Biology-Related Homework Help Cell Biology
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snets123 snets123
wrote...
11 years ago
To determine the phenotype of an individual who expresses a dominant trait. you would cross that individual with an individual who___.
a. expresses the dominant trait
b. is homozygous dominant for that trait
c. is homozygous recessive for that trait
d. has the genotype Aa
e. is heterozygous for that trait.
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wrote...
#1
11 years ago
I think your question should start: to determine the genotype...

Then the answer would be c.

You don't need to determine the phenotype, you just look at it.  The phenotype is the trait that you see.

But if you see the dominant trait, then you don't know if they are homozygous or heterozygous. So you cross with homozygous recessive,  if any of the progeny express the recessive trait then the original must have been heterozygous
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