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In polygenic inheritance, a trait is con...

In polygenic inheritance, a trait is controlled by two pairs of genes. Two individuals which are heterozygous for both genes, crossed each other, such type of cross produces what phenotypic ratio ?

A

`1:2:1`

B

`9:3:3:1`

C

`1:4:6:4:1`

D

`1:6:15:20:15:6:1`

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • When two individuals, heterozygous for the same genes, are bred together, they produce

    A
    Only dominant phenotypes, all of he same genotypes
    B
    Only recessive phenotypes
    C
    Only dominant phenotypes of different genotypes
    D
    Both recissive and diminant phentypes. The Latter being of two genotypes

  • In a polygenic inheritance of skin colours controlled by two gene pairs, how many phenotypes, mulattoes and total progenies are formed in F_(2)

    A
    3, 3, 16 respectively
    B
    5, 6, 16 respectively
    C
    7, 20, 64 respectively
    D
    7, 6, 16 respectively

  • In quantitative inheritance, when a character is controlled by two pair of genes, the ratio obtained in F_(2) generation is …………

    A
    `1:2:1`
    B
    `1:4:6:4:1`
    C
    `9:3:3:1`
    D
    `1:6:15:20:15:6:1`

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    Which one of the following crosses will produce two phenotypes in next generation ?

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    A cross between two heterozygous individuals will yield homozygous individuals

    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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