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Gametes are haploid cells which means they have only half the normal number of somatic cell (diploid). Somatic cells have 46 chromasomes, organised into 23 pairs, and gametes have only one chromasome from each pair.
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∙ 15y ago
Wiki User
∙ 12y ago23
Gametes (eggs and sperm) need to have half the normal chromosome number OS that when they combine the create a normal (or diploid) cell with 46 chromosomes.
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How many gametes do humans contain?
A human gamete has 22 autosomes and one sex chromosome. However, special cases may arise due to aneuploidy which can result in two copies of an autosome, e.g. chromosome 21, 18, etc. or the non-disjunction of sex chromosomes, X and/or Y.
At the end of s phase each chromosome has how many coiled dna molecules?
2 coiled DNA molecules.
How meiosis maintain a constant number of chromosome within a species?
Meiosis creates gametes (sperm and ova/eggs) which are involved in sexual reproduction. The result of meiosis is cells with half the number of chromosomes as a somatic (non-sex) cell. This ensures that when the gametes join during sexual reproduction, the resulting organism has the correct number of chromosomes (half from each gamete). Thus meiosis maintains the chromosome number.
Which phase balances chromosome in ceel cycle?
in S phase
When does the chromosome number double?
The chromosome number only doubles when two haploid gametes form to produce a diploid zygote. Example: In humans, sperm cells and eggs have 23 chromosomes, the haploid number. Once they fuse, the number doubles to 46 chromosomes. You may be confusing this with chromosome replication. In chromosome replication, the number of chromosomes does not double, but the number of strands double. (A single stranded chromosome turns into a double stranded chromosome.) However, it is still considered a single chromosome, but with identical sister chromatids. This replication occurs during the S-phase of the cell cycle, before mitosis or meiosis.
How many chromosomes are in a chicken' s gametes?
its good
How many chromatids does each chromosome have before S-phase?
There are two chromatids for each chromosome before the S-phase. The S-phase is wherein DNA of each chromosome is replicated.
How many chromosome s do humans have?
23
Do you agree or disagree that homologous chromosomes are found in gametes?
Have to say Nay. Two chromosomes are 'homologous' , to my understanding, only if each is IDENTICAL with the other - this means a pair. Gametes are haploid, meaning that only one copy of each (normally diploid or paired) chromosome (s) is (are) present.
Do you agree or disagree that homologous chromosomes are found in gametes. explain?
Have to say Nay. Two chromosomes are 'homologous' , to my understanding, only if each is IDENTICAL with the other - this means a pair. Gametes are haploid, meaning that only one copy of each (normally diploid or paired) chromosome (s) is (are) present.
How many gametes do humans contain?
A human gamete has 22 autosomes and one sex chromosome. However, special cases may arise due to aneuploidy which can result in two copies of an autosome, e.g. chromosome 21, 18, etc. or the non-disjunction of sex chromosomes, X and/or Y.
When is s phase complet?
S phase is complete when each chromosome has been duplicated.
How many chromosome 7 s are there in the human nucleus?
Two, one from each parent. Over 90,000 genes are found on each chromosome and are mostly responsible for protein productions.
At the end of s phase each chromosome has how many coiled dna molecules?
2 coiled DNA molecules.
When do gametes typically stop maturing in human females?
usually by their 40's or 50's
How many chromosomes s in the human body?
Every human being has 23 pairs of chromosome which translates into 46 chromosomes.
How meiosis maintain a constant number of chromosome within a species?
Meiosis creates gametes (sperm and ova/eggs) which are involved in sexual reproduction. The result of meiosis is cells with half the number of chromosomes as a somatic (non-sex) cell. This ensures that when the gametes join during sexual reproduction, the resulting organism has the correct number of chromosomes (half from each gamete). Thus meiosis maintains the chromosome number.
