In organisms where meiosis occurs to create gametes, sex cells are made to have half as many chromosomes as regular body cells have. For example, a human man's sex cell or gamete would have 23 chromosomes and the non-sex cells in his body (the ones that aren't produced in his testes) would contain 46 chromosomes. This is for the purpose of creating progeny that have an increased variety of genetic information. This is possible because the male gamete combines with the female gamete to create a whole new organism with a new combination of genetic information that has the correct number of chromosomes.
4. Two gametes get together to make something new. Just double up!
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Gametes have half the number of chromosomes - therefore if the diploid number is 22, the gametes would have 11 chromosomes.
If the gametes contain 25 chromosomes, the organism will have 50 chromosomes in its body cells. This is because during fertilization, the gametes (sperm and egg) fuse to form a zygote, which will contain a total of 50 chromosomes, with 25 from each parent.
Gametes, such as sperm and egg cells, have half the number of chromosomes found in somatic cells. Therefore, human gametes have 23 chromosomes each.
20 chromosomes
16 (apex)
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4. Two gametes get together to make something new. Just double up!
32
Gametes have half the number of chromosomes - therefore if the diploid number is 22, the gametes would have 11 chromosomes.
When a zygote is diploid it obtains two sets of chromosomes. Gametes contain one set of chromosomes. Therefore, 6 chromosomes would amount to 3 sets of gametes.
When a zygote is diploid it obtains two sets of chromosomes. Gametes contain one set of chromosomes. Therefore, 6 chromosomes would amount to 3 sets of gametes.
In humans, gametes (sperm and eggs) are haploid, meaning they contain half the number of chromosomes found in somatic (body) cells. If an organism has 40 chromosomes in its diploid somatic cells, its gametes will have 20 chromosomes. This reduction occurs through meiosis, which ensures that when gametes fuse during fertilization, the resulting offspring have the correct diploid number of chromosomes.
If the gametes contain 25 chromosomes, the organism will have 50 chromosomes in its body cells. This is because during fertilization, the gametes (sperm and egg) fuse to form a zygote, which will contain a total of 50 chromosomes, with 25 from each parent.
For a species with three pair of chromosomes how many gametic combinations are possible?
In human gametes, chromosomes are not paired. Instead, each gamete has one set of 23 chromosomes, and is said to be haploid.