The reproductive cells contain only half the number of chromosomes as compared to the normal body cells of an organism. The human sperm and egg have 23 chromosomes each. So when they fuse together, the zygote formed has 23+23=46 chromosomes. So the required ratio is 46 : 23, i.e., 2 : 1.
What would be the ratio of chromosome number between an egg and sperm?
Answer Expert Verified
(3) The Sperm contains 22 autosomes + X or Y chromosome. (4) So the zygote formed after fertilization contain 44 autosomes + XX or XY Chromosomes. * The Ratio of chromosomes between an egg and it’s zygote would be 23:46 or 1:2. Hope it helps.
Why does the number of chromosomes differ in ovum and zygote?
Chromosomes numbers are different in ovum and zygote
People have two of each chromosome, one from the mother and one from the father. The sperm is what carries the chromosomes (but only one of each chromosome) that come from the father.
How many chromosomes would be in an offspring?
At the end of mitosis, the two daughter cells will be exact copies of the original cell. Each daughter cell will have 30 chromosomes. At the end of meiosis II, each cell (i.e., gamete) would have half the original number of chromosomes, that is, 15 chromosomes.
How many chromosomes are in a sperm?
Chromatin is packed in a specific way into the 23 chromosomes inside human spermatozoa.
What is the ratio of chromosome?
Nigon. Generally, a 1:1 ratio results in a female and a 1:2 ratio results in a male. When calculating the ratio, Y chromosomes are ignored. For example, for a diploid drosophila that has XX, the ratio is 1:1 (2 Xs to 2 sets of autosomes, since it is a diploid).
What would be the ratio of chromosome?
In human beings, the egg cell is haploid while the zygote is diploid in nature. There are 23 chromosomes in an egg cell and 46 chromosomes in a zygote. Therefore, the ratio of chromosome number between an egg and a zygote would be 1:2.
How is human sperm genetically different from the egg?
During fertilization, it fuses with male gamete (also having haploid number of chromosomes) to form a zygote that has diploid number of chromosomes. Sperms and eggs are genetically different in terms of nature of sex chromosome. The sperm contain either X or Y-chromosome whereas an egg will always have an X-chromosome.
What is the difference between an egg cell and a zygote 2 points?
Females produced a large gamete called an egg cell while males produce a tadpole-like gamete called a sperm cell. Zygote is the diploid cell that results from the fertilization between an egg and a sperm.
Why the zygote has the number of chromosomes that it does?
To produce the needed number of chromosomes in sperm and eggs, meiosis reduces the number of chromosomes by half. … Thus, the zygote has 46 chromosomes, and when the zygote undergoes mitosis to begin to form an embryo, each cell will have the normal number of 46 chromosomes.