Question

fill in the blanks with the correct words from the list provided. 1. in life - cycles that alternate between haploid and diploid stages, click to select acts to reduce the number of chromosomes per cell from two sets to one set. 2. in life - cycles that alternate between haploid and diploid stages, click to select acts to double the number of chromosomes per cell from one set to two sets. 3. in life - cycles that alternate between haploid and diploid stages, click to select acts to keep the number of chromosomes per cell the same. 4. in animals, a single diploid cell called a click to select divides by mitosis to give rise to all the cells of the adult body. 5. during fertilization, each haploid click to select contains the genetic contribution from one of the two parents. 6. cells that have one set of chromosomes are called click to select. 7. cells that have two sets of chromosomes are called click to select.

Explanation:

1. Meiosis reduces chromosome number from diploid (two - sets) to haploid (one - set) in life - cycles with alternation of generations.
2. Fertilization doubles the chromosome number from haploid (one - set) to diploid (two - sets) as gametes fuse.
3. Mitosis maintains the same chromosome number as the parent cell during cell division in such life - cycles.
4. A zygote is a single diploid cell that divides by mitosis to form all cells of the adult body in animals.
5. Gametes are haploid cells that carry genetic material from one of the two parents during fertilization.
6. Haploid cells have one set of chromosomes.
7. Diploid cells have two sets of chromosomes.

Answer:

1. Meiosis
2. Fertilization
3. Mitosis
4. Zygote
5. Gamete
6. Haploid
7. Diploid