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Why does the formation of gametes involve meiosis?
Meiosis is the process of making a cell that has the same number of chromosomes as the parents. In order to keep the same number, they each make gametes which have half their own number of chromosomes. When one gamete, sperm, fertilizes the other gamete, the egg, they join their number of chromosomes together to make an offspring with the same number as the parents have. If they did not do this by meiosis, then very soon, we would have animals which huge numbers of chromosomes.
Do all dogs have the same number of chromosomes?
Yes. All dogs have 38 pairs of autosomal chromosomes (inheriting one from each of their parents) and two sex chromosomes.
Do offspring that result from meiosis have twice as many chromosomes as their parents?
No, offspring resulting from meiosis have half the number of chromosomes as their parents. Meiosis involves two rounds of cell division that result in cells with half the original number of chromosomes. When two gametes combine during fertilization, the resulting offspring will have a complete set of chromosomes.
Why do reproductive cells need to have half the normal number of chromosomes?
Humans and other organisms that reproduce sexually need to have half the normal number of chromosomes to make sure their offspring have the same number of chromosomes as they do - the father and mother each contribute half of their chromosomes (sperm and egg).
Do brothers with the same parents have the same chromosomes?
Yes, each parent gives them 23 chromosomes. That is why they look alike.
Do bananas and pears have the same number of chromosomes?
Bananas have 33 chromosomes. Pears have 32.
Why is it important that sex cells have exactly the number of chromosomes as the body cells?
The DO NOT "have exactly the number of chromosomes as the body cells", they have 1/2 that number. This is so that when two sex cells come together to form an embryo, the cells of that embryo have exactly the same number of chromosomes as the body cells of the two parents and not twice that number.
What happens to the number of chromosomes in mitosis?
During mitosis, the number of chromosomes remains the same. The cell duplicates its chromosomes and then separates them evenly into two daughter cells, each with the same number of chromosomes as the original cell.
How many chromosomes will a human liver cell have when compared with a human nerve cell?
Both human liver cells and human nerve cells will have the same number of chromosomes, which is 46. This is because all body cells in humans (somatic cells) have the same number of chromosomes, which are inherited from the parents and not altered during differentiation into different cell types.
Am organism that reproduces asexually will have offspring that have?
Same number of chromosomes
What does it mean to be homozygous for a trait?
both chromosomes from your parents are the same
Why cant mitosis provide for the sexual reproduction of offspring that contain the same number of chromosomes as the parents?
Mitosis produces two identical daughter cells with the same number of chromosomes as the parent cell. However, sexual reproduction requires the combination of genetic material from two parents to create offspring with genetic variation. This variation is achieved through meiosis, where the chromosome number is halved and genetic recombination occurs.
