Genetics: practice question

A Biochemistry question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Biochemistry · Genetics

Sample item

Which inheritance pattern shows affected fathers transmitting a trait to all daughters but no sons?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

B. X-linked dominant

An affected father passes his X chromosome to all daughters and his Y chromosome to all sons, producing this X-linked dominant pattern.

Option by option

  • A. Autosomal recessive

    Autosomal inheritance affects both sexes differently.

  • B. X-linked dominant (correct)

    Correct: paternal X reaches every daughter.

  • C. Y-linked

    Y-linked traits pass father to son.

  • D. Mitochondrial

    Mitochondrial traits follow maternal transmission.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

More Biochemistry questions

Questions about this Biochemistry question

What is the answer to this Biochemistry question?

The best answer is B, X-linked dominant. An affected father passes his X chromosome to all daughters and his Y chromosome to all sons, producing this X-linked dominant pattern.

Why is "Autosomal recessive" not the answer?

Autosomal inheritance affects both sexes differently.

Why is "Y-linked" not the answer?

Y-linked traits pass father to son.

Why is "Mitochondrial" not the answer?

Mitochondrial traits follow maternal transmission.

What concept does this question test?

It tests Genetics in Biochemistry. The correct option holds because: Correct: paternal X reaches every daughter.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Genetics?

Build one table of enzyme deficiency, disease, inheritance and key finding, then revise it by spaced recall. Then use the flashcards and the other Biochemistry questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.