(B) The nucellar cells are diploid $(2n)$. Given $2n = 24$,the haploid number $(n)$ is $12$.$1$. Pollen grains are haploid $(n)$,so they contain $12$

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(B) The nucellar cells are diploid $(2n)$. Given $2n = 24$,the haploid number $(n)$ is $12$.$1$. Pollen grains are haploid $(n)$,so they contain $12$ chromosomes.$2$. The endosperm in angiosperms is formed by triple fusion and is triploid $(3n)$. Thus,$3 \times 12 = 36$ chromosomes.$3$. The embryo is formed by the fusion of a male gamete and an egg cell,making it diploid $(2n)$. Thus,$2 \times 12 = 24$ chromosomes.Therefore,the sequence is $12, 36, 24$.

Class 12 Biology Sexual Reproduction in Flowering Plants Mix Examples-Sexual Reproduction in Flowering Plants

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If the number of chromosomes in the nucellar cells of an angiosperm is $24$,what will be the number of chromosomes in the pollen grain,endosperm,and embryo,respectively?

A
$24, 36, 24$
B
$12, 36, 24$
C
$12, 24, 36$
D
$24, 12, 12$

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Class 12 Questions

Class 12

Biology Questions

Chapter

Sexual Reproduction in Flowering Plants

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Mix Examples-Sexual Reproduction in Flowering Plants

Which of the following plants possesses flowers on its rhizome?

Medium

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$Statement\; 1$: Zygote is the link between two generations.
$Statement\; 2$: Zygote is the product of two gametes and the producer of the next generation.

Medium

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Identify the correct modes of entry of the pollen tube in the diagrams given below.

Medium

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Differentiate between:
$(a)$ Bract and Bracteole
$(b)$ Pulvinus and Petiole
$(c)$ Pedicel and Peduncle
$(d)$ Spike and Spadix
$(e)$ Stamen and Staminode
$(f)$ Pollen and Pollinium

Medium

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Match Column-$I$ with Column-$II$ and select the correct option using the codes given below:

Column-$I$ Column-$II$

$(A)$ Pistils fused together $(1)$ Gametogenesis

$(B)$ Formation of gametes $(2)$ Monocarpellary

$(C)$ Hyphae of higher Ascomycetes $(3)$ Syncarpous

$(D)$ Unisexual female flower $(4)$ Dikaryotic

Column-$I$	Column-$II$
$(A)$ Pistils fused together	$(1)$ Gametogenesis
$(B)$ Formation of gametes	$(2)$ Monocarpellary
$(C)$ Hyphae of higher Ascomycetes	$(3)$ Syncarpous
$(D)$ Unisexual female flower	$(4)$ Dikaryotic

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If the number of chromosomes in the nucellar cells of an angiosperm is $24$,what will be the number of chromosomes in the pollen grain,endosperm,and embryo,respectively?

Similar Questions

Which of the following plants possesses flowers on its rhizome?

$Statement\; 1$: Zygote is the link between two generations.$Statement\; 2$: Zygote is the product of two gametes and the producer of the next generation.

Identify the correct modes of entry of the pollen tube in the diagrams given below.

Differentiate between:$(a)$ Bract and Bracteole$(b)$ Pulvinus and Petiole$(c)$ Pedicel and Peduncle$(d)$ Spike and Spadix$(e)$ Stamen and Staminode$(f)$ Pollen and Pollinium

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$Statement\; 1$: Zygote is the link between two generations.
$Statement\; 2$: Zygote is the product of two gametes and the producer of the next generation.

Differentiate between:
$(a)$ Bract and Bracteole
$(b)$ Pulvinus and Petiole
$(c)$ Pedicel and Peduncle
$(d)$ Spike and Spadix
$(e)$ Stamen and Staminode
$(f)$ Pollen and Pollinium