0
Each gamete, the sperm or the egg, is haploid and contains half the number of chromosomes of a normal cell. When the sperm and egg combine to form a zygote, the zygote becomes a diploid cell with the normal amount of chromosomes.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
How does the alternation of meiosis and fertilization in the life cycles of sexually reproducing organisms maintain the normal chromosome count for each species?
Simple, Meiosis reduce the chromosome number in half while fertilization doubles the chromosome number. n=chromosome number Meiosis = 2n (primordial germ cells) ----> n (sperm cell/egg cell/polar bodies) Fertilization = sperm (n) + egg (n) ----> 2n (zygote)
How does the alternation of Meiosis and fertilization in the life cycle of sexually reproducing organisms maintain normal chromosome count for each species?
Simple, Meiosis reduce the chromosome number in half while fertilization doubles the chromosome number. n=chromosome number Meiosis = 2n (primordial germ cells) ----> n (sperm cell/egg cell/polar bodies) Fertilization = sperm (n) + egg (n) ----> 2n (zygote)
What might happen if human chromosomes did not separate?
well if human chromosomes number 21 does not separate during fertilization the baby will be with down syndrome. at fertilization of the egg with a normal sperm the zygote contain three chromosome number 21 (trizomic 21) hence the zygote contain 47 chromosome instead of 46.
Does meiosis increaase the number of chromosomes in a cell?
No, it halves it. This is because Meiosis is only used in the production of sex cells (gametes), and two gametes are needed for a zygote to be created, and each carries half the normal number of chromosomes. When they join together during fertilization their offspring will carry the normal number of chromosomes.
Why internal fertilization often produces fewer offspring than external fertilization?
Internal fertilization utilizes a placenta and womb and this limits the number of offspring that can be produced. Internal fertilization also has a higher birthrate than external fertilization.
What does the number 232 mean in fertilization?
The normal numbering system would imply that the fertiliser contains 2% by weight of Nirogen 3% by weight of Phosphorus and 2% by weight of Potassium.
What are the some disadvantages of external fertilization?
It depends. Are you talking about humans? 8D Humans use internal fertilization but the disadvantages in external fertilization is that a small number of eggs survive.
What process takes meiosis this reduced set number and returns it to match the original set number of the parent cell?
Fertilization of the egg by the sperm. The resulting cell is a zygote, which contains the same number of chromosomes as a normal body cell for that species. For example, in humans, sperm cells have 1 set of 23 chromosomes, as do egg cells. So when they unite in fertilization, the zygote will have 2 sets of 23 chromosomes, for a total of 46.
What is the process can produce a large number of offspring?
invitro fertilization
When during the human cycle is the diploid number of chromosomes restored?
Fertilization
What process union of egg and sperm restores chromosome number?
Fertilization.
How is the number of eggs an animal produces related to its form of fertilization and development?
The number of eggs an animal produces is related its form of fertilization and development because the more eggs there are, the more likely it is for one to be fertilized.
