NEET · Biology · STD 12 - 4. principal of inheritance and variation

Which one of the following can be explained on the basis of Mendel's Law of Dominance? \(A\). Out of one pair of factors one is dominant and the other is recessive. \(B\). Alleles do not show any expression and both the characters appear as such in \(F_2\) generation. \(C\). Factors occur in pairs in normal diploid plants. \(D\). The discrete unit controlling a particular character is called factor. \(E\). The expression of only one of the parental characters is found in a monohybrid cross. Choose the correct answer from the options given below:

A \(A, C, D\) and \(E\) only
B \(B, C\) and \(D\) only
C \(A, B, C, D\) and \(E\)
D \(A, B\) and \(C\) only

Verified Solution

Answer & Solution

Correct Answer

(A) \(A, C, D\) and \(E\) only

Step-by-step Solution

Detailed explanation

According to Law of Dominance (\(1\)) Factors occur in pairs

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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Match the following columns and select the correct option

Column\(-I\)	Column\(-II\)
\((a)\) Pituitary gland	\((i)\) Grave's disease
\((b)\) Thyroid gland	\((ii)\) Diabetes mellitus
\((c)\) Adrenal gland	\((iii)\) Diabetes insipidus
\(Z(d)\) Pancreas	\((iv)\) Addision's disease

\((a)\quad(b)\quad(c)\quad(d)\)

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