MHT CET · BIOLOGY · STD 12 - 3. Inheritance and Variation

Which one of the following is an example of pleiotropy?

A Haemophilia
B Thalassemia
C Sickle cell anaemia
D Colour blindness

Verified Solution

Answer & Solution

Correct Answer

(C) Sickle cell anaemia

Step-by-step Solution

Detailed explanation

Pleiotropy: Single gene influencing many traits.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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The development of male gametes in the pollen grains in angiosperms involves ________.

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Match the types of animals in Column I with their adaptations in Column II

	Colum I		Column II
i	Eurythermal	a.	Can tolerate only a narrow range of salinity
ii.	Stenothermal	b.	Can tolerate a wide range of temperature
iii.	Euryhaline	c.	Can tolerate a wide range of salinity
iv.	Stenohaline	d.	Can tolerate only a narrow range of temperature

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