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1009 available questions

Biology · Question 991

In which cells can the G₀ phase persist for life?

  1. Nerve cells
  2. Blood cells
  3. Lens cells
  4. Both A and C
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Correct answer: D

Both A and C

The correct answer is Both A and C.

Biology · Question 992

Which are significant events of meiosis?

  1. Extensive recombination
  2. Random assortment of chromosomes
  3. Regeneration
  4. Both A and B
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Correct answer: D

Both A and B

The correct answer is Both A and B.

Biology · Question 993

The most common meiotic error is:

  1. Crossing over
  2. Random separation at anaphase I
  3. Non-disjunction
  4. All of these
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Correct answer: C

Non-disjunction

The correct answer is Non-disjunction.

Biology · Question 994

A trait suppressed in the F₁ generation is called:

  1. Dominant
  2. Recessive
  3. Both
  4. None of these
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Correct answer: B

Recessive

The correct answer is Recessive.

Biology · Question 995

Dihybrids are offspring of parents that:

  1. Differ in one contrasting pair
  2. Differ in two contrasting pairs
  3. Are one dominant and one recessive
  4. Are both recessive
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Correct answer: B

Differ in two contrasting pairs

The correct answer is Differ in two contrasting pairs.

Biology · Question 996

The Bombay phenotype is an example of:

  1. Incomplete dominance
  2. Codominance
  3. Epistasis
  4. Sex-linked inheritance
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Correct answer: C

Epistasis

The correct answer is Epistasis.

Biology · Question 997

Inheritance of continuously varying traits is called:

  1. Digenic inheritance
  2. Polygenic inheritance
  3. Monogenic inheritance
  4. Variable inheritance
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Correct answer: B

Polygenic inheritance

The correct answer is Polygenic inheritance.

Biology · Question 998

Which is an example of a continuously varying human trait?

  1. Eye colour
  2. Blood group
  3. Hair colour
  4. Skin colour
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Correct answer: D

Skin colour

The correct answer is Skin colour.

Biology · Question 999

Which is an example of discontinuous variation in humans?

  1. Weight
  2. Intelligence
  3. Skin colour
  4. ABO system of blood groups
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Correct answer: D

ABO system of blood groups

The correct answer is ABO system of blood groups.

Biology · Question 1000

Why is red-green colour blindness more common in men than in women?

  1. The allele is X-linked
  2. The allele is recessive
  3. The allele is recessive and X-linked
  4. The allele is dominant and X-linked
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Correct answer: C

The allele is recessive and X-linked

The correct answer is The allele is recessive and X-linked.