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Hybrid are generally superior to parents...

Hybrid are generally superior to parents due to

A

Heterosis

B

Homozygosity

C

Heterozygosity

D

Parents are generally weak.

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The correct Answer is:
A
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When two unrelated individuals or lines are crossed, the performance of F_(1) hybrids is often superior to both its parents. The phenomenon is called

When two unrelated individuals or lines are crossed, the perfomance of "F"_(1) hybrid is often superior to both its parents. This phenomenon is called:

Assertion : Phenotypic superiority of hybrid over either of its parents in one or more traits is termed hybrid vigour. Reason : Suppression of expression of recessive harmful genes occurs in heterozygotes.

DINESH PUBLICATION-GENETIC BASIS OF INHERITANCE-Revision Questions From Competitive Exams
  1. F(2) generation is produced as a result of

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  2. The process of removing stamen from flora buds during hybridisation ex...

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  3. Hybrid are generally superior to parents due to

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  4. Ratio 9 : 3 : 3 : 1 is due to:

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  5. The ratio of 9 : 7 is due to:

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  6. Monohybrid cross involves

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  7. A woman with albinic father marries an albinic man. The proportion of ...

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  8. In a dihybrid cross AABB xx aabb, "F"(2) progeny of AABB, AABb, AaBB a...

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  9. The term eugenics was coined by :

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  10. Mendel chose contrasting traits in Pea

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  11. How many contrasting traits of Pea pod were chosen by Mendel?

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  12. Monohybrid ratio is

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  13. Yellow colour is dominant over green colour. In a generation of 50% ye...

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  14. A cross between F(1) hybrid and a recessive parent (Tt xxtt) gives a r...

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  15. Different forms of a gene are called

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  16. O group mothe with O group child sues AB group man for fathership of c...

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  17. Mendel crossed a pure white -flowered recessive pea plant with a domi...

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  18. Genetically identical progeny is produced when the individual

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  19. Genes controlling seven traits in Pea studied by Mendel were actually ...

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  20. Cross AABb xx aaBb yields AaBB:AaBb:Aabb:aabb offspring in the ratio o...

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