The role of meiosis in barley plants A cell biologist examines a diploid cell fr

Question

The role of meiosis in barley plants

A cell biologist examines a diploid cell from a barley plant during prometaphase of mitosis and determines that 28 chromatids are present. The role of meiosis in this plant is to (Check all that apply):

1) increase the number of chromosomes per cell from 14 to 28.
2) produce 4 daughter cells that are genetically identical to each other.
3) reduce the number of chromosomes per cell from 28 to 14.
4) reduce the number of chromosomes per cell from 14 to 7.
5) produce 4 daughter cells that are genetically identical to the parental cell.

Explanation / Answer

4. reduce the number of chromosomes per cell from 14 to 7

Meiosis is reduction division. This type of division is required for production of haploid gametes. During prometaphase of mitosis, the genetic material is duplicated. Hence, the chromosome number will be 4n during this phase. After cell division, the cell returns to its normal ploidy, that is, 2n. Given that 4n is 28, the haploid cells will have n = 7.

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