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In a dihybrid crossm if you get 9:3:3:1...

In a dihybrid crossm if you get `9:3:3:1` ratio it denotes that

A

the alleles of two genes are interacting with each other

B

it is a multigenic inheritance

C

it is a case of multiple allelism

D

the alleles of two genes are segregating independently

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The correct Answer is:
D
Cross involving two contrasting characyers is called dihybrid cross or a two factor cross. The two factors of each trait assory at random and independent of the factors of other traits at the time of meiosis (gametogensis) and get randomly as well as independently rearranged in the offspring producing both parental and new combinations of traits. The explained the law of independent assortment given by Mendel.
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NCERT FINGERTIPS ENGLISH-PRINCIPLES OF INHERITANCE & VARIATION-EXEMPLAR
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  2. Conditions of a karyotype 2n pm 1 and 2n pm 2 are called

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  3. Distance between the genes and percentage of recombination shows

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  4. If a genetic disease is transferred from a phenotypically normal but c...

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  5. In sickle cell anaemia glutamic acid is replaced by valine Which one o...

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  6. Person having genotype I^(A) I^(B) would show the blood group as AB. T...

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  7. ZZ/ZW type of sex determination is seen in

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  8. A cross between two tall plants resulted in offspring having few dwa...

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  9. In a dihybrid crossm if you get 9:3:3:1 ratio it denotes that

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  10. Which of the following will not result in variations among siblings ?

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  11. Mendel's law of independent assortment holds good for genes situated...

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  12. Occasionally, a single gene may express more than one effect. The phen...

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  13. In a certain taxon of insects some have 17 chromosomes and the others ...

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  14. The inheritance pattern of a gene over generations amoung human is stu...

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  15. It is said that Mendel proposed that the factor controlling any charac...

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  16. In the F(2) generation a Mendelian dihybrid cross, the number of pheno...

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  17. Mother and father of a person with 'O' blood group have 'A' and 'B' bl...

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