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If the meiocyte of a maize plant contains 20 chromosomes, write the number of chromosomes in the endosperm and embryo of the maize grain and give reasons in support of your answer.
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Endosperm = 30 , Embryo = 20
Diploid meiocyte (20 chromosomes) form haploid gametes (10 chromosomes).
Two haploid gametes fuse to form diploid (20) zygote which develops into a (diploid = 20) embryo / syngamy of two haploid gametes to form a diploid zygote.
One haploid gamete (chromosome 10) fuses with two polar nuclei (chromosome 10 + 10) to form (triploid - 30) endosperm nuclei (which divides to form endosperm) / Triple fusion of three haploid nuclei (1 gamete + 2 polar nuclei) to form a triploid endosperm.
Diploid meiocyte (20 chromosomes) form haploid gametes (10 chromosomes).
Two haploid gametes fuse to form diploid (20) zygote which develops into a (diploid = 20) embryo / syngamy of two haploid gametes to form a diploid zygote.
One haploid gamete (chromosome 10) fuses with two polar nuclei (chromosome 10 + 10) to form (triploid - 30) endosperm nuclei (which divides to form endosperm) / Triple fusion of three haploid nuclei (1 gamete + 2 polar nuclei) to form a triploid endosperm.
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| Question Text | If the meiocyte of a maize plant contains 20 chromosomes, write the number of chromosomes in the endosperm and embryo of the maize grain and give reasons in support of your answer. |
| Updated On | Sep 27, 2023 |
| Topic | Sexual Reproduction in Flowering Plants |
| Subject | Biology |
| Class | Class 12 |
| Answer Type | Text solution:1 Video solution: 1 |
| Upvotes | 168 |
| Avg. Video Duration | 3 min |
