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valentina_108 [34]
3 years ago
11

What phenotypic ratio would you expect as a result of a test cross between a dihybrid organism and one that is homozygous recess

ive for alleles at two independent loci?

Biology
1 answer:
Artyom0805 [142]3 years ago
3 0

Answer:

¼ or 25% will be dihybrid organisms, ¼ will be heterozygous at first locus and recessive homozygous at other locus , ¼ of them will be recessive homozygous at first locus and heterozygous at other locus, and ¼ of them will be homozygous recessive for alleles at two independent loci.

Explanation:

A dihybrid organism is one that is heterozygous at two different genetic loci. So if we name one gene with D and other gene with R, dihybrid organism will have genotype DdRr.

If we cross that organism with the one that is homozygous recessive for alleles at two independent loci ddrr:

P: DdRr  x ddrr

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