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Assertion (A): In humans the genotype wi...

Assertion (A): In humans the genotype with all the dominant alleles (AABBCC) will have the darkest skin colour.
Reason (R):Ina polygenic trait,phenotype reflects the contribution of each allele.

A

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

B

Both Assertion (A) and Reason (R) are true , but Reason (R) is not the correct explanation of the Assertion (A).

C

Assertion (A) is true, but Reason (R) is false.

D

Assertion (A) is false, but Reason (R) is true.

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Assertion (A): Polygenic inheritance gives rise to varied skin tones in F_(2) generation. Reason ( R): Phenotype reflects the contribution of each allele, is influenced by the environment in case of polygenic inheritance.

Which of the following statements is / are correct for a polygenic inheritance ? 1. They show uniformity. 2. Controlled by three or more genes. 3. It is not influenced by the environment . In polygenic inheritance, phenotype reflects the contribution of recessive allele only .

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Assertion :- In Neurospora each gene either dominant or recessive express it's effect. Reason :- Neurospora contain many alleles of a gene.

Assertion :-The unmodified allele, which represents the orginal phenotype is the dominant allele and the modified allele is generally the recessive allele. Reason :- The modified allele could be responsible for production of a non functional enzyme or no enzyme at al.

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Assertion : It is not possible for human parents heterozygous for skin colour to have children darker or lighter than themselves. Reason : Human skin colour is controlled by a single pair of alleles.

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