The jimsonweed datura stramonium, normally has 12 chromosomes in the body cells. how many chromosomes will an egg cell of the weed have?

6 chromosomes in its egg cell

Explanation:

The Jimsonweed, Datura stramonium, is a plant that produces gametes in order for sexual reproduction to occur. All sexually reproducing organisms undergo meiosis to produce gametes. Likewise, an egg cell (female gamete) will be produced by the Jimsonweed plant via meiosis. Meiosis is a kind of cell division that results in daughter cells with each having their chromosomal number reduced by half.

If the body cells of the Jimsonweed contain 12 chromosomes each, the gametes (egg cell) produced by meiotic division will have 6 number of chromosomes. This reduction in the chromosome number of gametes is important in order to maintain the correct chromosomal number of the offsprings. For example, a diploid organism (2n) undergoes meiosis to produce haploid gametes (n), which will unite with another (n) gamete to produce the 2n offspring.