If the number of chromosomes in the nucellar | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(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 $12$

Vedclass · Accepted Answer

$12, 36, 24$

Vedclass · Answer

(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,$3 	imes 12 = 36$ chromosomes.$3$. The embryo is formed by the fusion of a male gamete and an egg cell,making it diploid $(2n)$. Thus,$2 	imes 12 = 24$ chromosomes.Therefore,the sequence is $12, 36, 24$.

List-$I$	List-$II$
$(a)$ Stamen	$(i)$ Microsporangium
$(b)$ Pistil	$(ii)$ Microsporophyll
$(c)$ Anther	$(iii)$ Megasporangium
$(d)$ Ovule	$(iv)$ Megasporophyll

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

Match the following columns:
List-$I$ List-$II$
$(a)$ Stamen $(i)$ Microsporangium
$(b)$ Pistil $(ii)$ Microsporophyll
$(c)$ Anther $(iii)$ Megasporangium
$(d)$ Ovule $(iv)$ Megasporophyll

Which one of the following may require pollinators,but is genetically similar to autogamy?

What is the viability period of pollen grains in members of the families $Rosaceae$,$Leguminosae$,and $Solanaceae$?

Continued self-pollination results in

Choose the correct sequence for the different stages in the life cycle of rice.

Vedclass Test Series

Exam Paper Generator

Online Exam Module