The spore-bearing structure in Riccia (a liverwort) is called:

The correct answer is C: Capsule. In bryophytes like Riccia, the capsule is the sporophyte that produces spores. It remains embedded in the gametophyte.

Which of the following is an example of a genetically modified crop approved in India as of 2024?

The correct answer is B: Bt Cotton. Bt Cotton is the only GM crop commercially cultivated and approved in India since 2002, with extensive adoption across states.

In the mature female gametophyte (embryo sac) of angiosperms, how many nuclei are present at maturity?

The correct answer is D: 8 nuclei. The mature female gametophyte (7-celled, 8-nucleate) contains: 1 egg cell, 2 synergids, 2 polar nuclei (in central cell), and 3 antipodal cells = 8 nuclei total.

Which of the following stomatal movements is primarily controlled by turgor pressure changes in guard cells?

The correct answer is C: Hydroactive movements. Stomatal opening and closing are mainly controlled by hydroactive movements, which involve osmotic changes in guard cells due to potassium ion accumulation.

What is the approximate percentage of solar energy fixed by plants during photosynthesis?

The correct answer is A: 1-5%. Only 1-5% of incident solar radiation is actually fixed by plants through photosynthesis. The rest is either reflected or absorbed as heat.

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NEET Botany
Genetics & Heredity

Botany questions for NEET UG — Plant Anatomy, Physiology, Reproduction, Ecology.

13 Q 7 Topics Take Mock Test

Difficulty: All Easy Medium Hard 11–13 of 13

Topics in NEET Botany

All Plant Kingdom 100 Plant Anatomy 100 Plant Physiology 100 Reproduction in Plants 60 Genetics & Heredity 20 Ecology & Environment 20 Biotechnology in Plants 20

Q.11 Medium Genetics & Heredity

Color blindness in humans is an X-linked recessive trait. If a carrier female (XᶜX) marries a normal male (XᶜY), what percentage of their sons will be color blind?

A 0%

B 25%

C 50%

D 100%

Correct Answer: C. 50%

EXPLANATION

Cross: XᶜX × XᶜY produces: XᶜXᶜ (normal daughter), XᶜX (carrier daughter), XᶜY (color blind son), XᶜY (normal son). 50% of sons are color blind.

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Q.12 Medium Genetics & Heredity

What is the term for genes located on the X chromosome?

A Autosomal genes

B Sex-linked genes

C Cytoplasmic genes

D Lethal genes

Correct Answer: B. Sex-linked genes

EXPLANATION

Sex-linked genes are located on sex chromosomes, particularly the X chromosome. X-linked traits show different inheritance patterns in males and females.

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Q.13 Medium Genetics & Heredity

In a dihybrid cross (AaBb × AaBb), what is the expected phenotypic ratio in F2?

A 3:1

B 9:3:3:1

C 1:2:2:4

D 1:1:1:1

Correct Answer: B. 9:3:3:1

EXPLANATION

The classical dihybrid cross ratio is 9:3:3:1, following Mendel's Law of Independent Assortment for two independently assorting genes.

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NEET Botany Genetics & Heredity

NEET Botany
Genetics & Heredity