Which of the following is a dominant trait in Mendel's experiments?
1. Dwarf plants
2. Green seeds
3. Wrinkled seeds
4. Yellow seeds
Subtopic:  Introduction to Genetics: 1 | Introduction to Genetics: 2 | Dihybrid Cross: Details |
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In Mendel's experiments with garden peas, round seed shape (RR) was dominant over wrinkled seeds (rr), and yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2 generation of the cross RRYY x rryy?

1. Only round seeds with green cotyledons
2. Only wrinkled seeds with yellow cotyledons
3. Only wrinkled seeds with green cotyledons
4. Round seeds with yellow cotyledons and wrinkled
seeds with yellow cotyledons

Subtopic:  Introduction to Genetics: 2 | Dihybrid Cross: Details |
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AIPMT - 2006
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The F2 phenotypic ratio of a dihybrid cross is?

1. 1 : 1 : 1 : 1 2. 1 : 1
3. 9 : 3 : 3 : 1 4. 1 : 4 : 6: 4 : 1
Subtopic:  Dihybrid Cross: General Consideration | Dihybrid Cross: Details |
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A human male produces diallelic sperms in equal proportion AB, Ab, aB, and ab. The genotype of the person would be:

1.Aa Bb2.Aa BB
3.AA Bb4.AA BB.

Subtopic:  Dihybrid Cross: Details |
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In a typical dihybrid cross, the probability of obtaining a genotype with both recessive traits is:
1. 1/4
2. 1/16
3. 3/16
4. 9/16
Subtopic:  Dihybrid Cross: Details |
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A garden pea plant produced axial white flowers. Another of the same species produced terminal violet flowers. Identify the dominant traits.
1. axial, violet flowers.
2. Axial, white flowers
3. Terminal, violet flowers
4. Terminal, white flowers
Subtopic:  Dihybrid Cross: Details |
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