Question

what is the main event during metaphase i of meiosis? a sister chromatids are pulled apart b the cell divides into two haploid cells c the nuclear membrane dissolves d homologous chromosomes align at the metaphase plate what forms at the end of meiosis when a sperm and egg cell combine? a a diploid zygote b a diploid gamete c a haploid embryo d a haploid zygote what is the difference between diploid and haploid cells? a diploid cells are produced by meiosis, while haploid cells are produced by mitosis. b diploid cells have one set of chromosomes, while haploid cells have two sets c diploid cells are involved in sexual reproduction, while haploid cells are not. d diploid cells have two sets of chromosomes, while haploid cells have one set. which of the following occurs during telophase ii? a crossing - over happens b homologous chromosomes pair up c sister chromatids align at the metaphase plate d nuclear membranes reform around the chromosomes in each of the four new cells

Explanation:

1. During Metaphase I of meiosis, homologous chromosomes align at the metaphase plate. Sister - chromatids are pulled apart in Anaphase II, the cell divides into two haploid cells in Telophase I and cytokinesis, and the nuclear membrane dissolves in Prophase I.
2. When a sperm and egg cell combine (fertilization), a diploid zygote is formed. Gametes are haploid, and an embryo is the developing stage after the zygote.
3. Diploid cells have two sets of chromosomes, while haploid cells have one set. Mitosis produces diploid cells (in somatic cells), and meiosis produces haploid cells (gametes). Both diploid and haploid cells are involved in sexual reproduction.
4. During Telophase II of meiosis, nuclear membranes reform around the chromosomes in each of the four new cells. Crossing - over happens in Prophase I, homologous chromosomes pair up in Prophase I, and sister chromatids align at the metaphase plate in Metaphase II.

Answer:

1. d. Homologous chromosomes align at the metaphase plate
2. a. A diploid zygote
3. d. Diploid cells have two sets of chromosomes, while haploid cells have one set.
4. d. Nuclear membranes reform around the chromosomes in each of the four new cells