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If a negro marries a white skin female, ...

If a negro marries a white skin female, the mulattoes are born.if such mulattoes intermary, progeny will show a gradual gradation of skin colour in ratio of:-

A

`9:3:3:1`

B

`1:4:6:4:1`

C

`1:4:6:15:20:15:6:4:1`

D

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

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The correct Answer is:
D
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TRUEMEN BIOLOGY ENGLISH-PRINCIPLES OF INHERITANCE AND VARIATIONS -MCQs
  1. A modified dihybrid mendelian ratio of 9:3:4 shows

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  2. Failure of one gene to express it in the presence of a non-allelic gen...

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  3. If a negro marries a white skin female, the mulattoes are born.if such...

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  4. Wife is PTC nontaster and husband is PTC taster. Their son is taster b...

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  5. Predict from the following chart

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  6. In the following pedigree chart, the mutant trait is shaded black. The...

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  7. In the given pedigree, what the shaded symbols indicate

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  8. From the pedigree of a family given below, it is clear that trait is i...

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  9. In a family, father had a trait but mother did not. All their sons and...

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  10. Which gene is connected with multiple phenotypes?

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  11. If both parents are albino, all the offspring shall be

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  12. Albinism is due to nonsynthesis (absence) of melanin on account of abs...

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  13. A recessive trait in garden pea is

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  14. Which is correct about traits chosen by Mendel ?

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  15. "Gametes are never hybrid ". It is a statement of law of

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  16. 23 pairs of chromosomes can give rise to how many combinations?

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  17. R is dominant red flowerr trait while r is recessive white flower trai...

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  18. In complementary genes, the dihybrid ratio of 9:3:3:1 is modified to

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  19. On selfing a plant of F(1)-generation with genotype "AaBbCC", the phen...

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  20. Rh factor found in man and Rhesus monkey was discovered by

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