A-If you cross a true-breeding dominant plant with a true-breeding recessive pla

Question

A-If you cross a true-breeding dominant plant with a true-breeding recessive plant, what will be the phenotype of the resulting progeny?
1. all dominant
2. all recessive
3. 50% dominant/50% recessive
4. 75% dominant/25% recessive
5. 25% dominant/75% recessive

B-If you self-fertilize F1 progeny, what will be the dominant to recessive phenotypic ratio of the progeny?
1. 4:1
2. 3:1
3. 2:1
4. 1:2:1
5. 1:3:1

C-How many different phenotypes appear in the F2 generation of a dihybrid cross?
1. 1
2. 2
3. 3
4. 4
5. 5

D-An allele having more than one effect on an individual's phenotype is called
1. a polygene
2. synteny
3. codominance
4. polysony
5. pleiotropy

Explanation / Answer

A 1. all dominant ======================================= B 2. 3:1 ============= C 4. 4 ==================== D 5. pleiotropy

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