If you started with a cell with four chromosomes, what would happen if sexual reproduction took place for four generations using
diploid (2n) cells instead of haploid cells (n)?
(In other words, how many chromosomes would the cells have after four generations without meiosis?).
(In other words, how many chromosomes would the cells have after four generations without meiosis?).
1 answer:
Answer:
it will be 64 chromosomes after four generations.
Explanation:
Sexual reproduction follows meiosis cell division . this is two step process in which one round of replication occurs and two round of cell division occurs. by which chromosomes are converted to haploid state(n) instead of diploid(2n) state.
when two haploid cells are sexually matted, one diploid(2n) zygote cells are produced.
hare no haploid cells are produced rather diploid cells are matted. So, the chromosome no. of zygote will be doubled after each generation.
so, after 4 generation their will be 64 chromosome.
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The immense amount of information stored in DNA is coded with just four base nucleotides. These four nucleotides are paired by twos to form <u>complementary </u>DNA chains.
The makeup of DNA is limited to two <u>pairs </u>of nucleotides bases. One of these pairs is a pyrimidine base whilst the other forms a purine base. The four nucleotides that will make up the entire DNA code are:
- Adenine (A)
- Guanine (G)
- Cytosine (C)
- Thymine (T).
A and G will pair to form the purine base, meanwhile, Cytosine pairs with Thymine to form the <em>pyrimidine base</em>. As per the entire DNA code, A will always pair with G.
Whilst C always pairs with T. This is due to the very nature of the nucleotides themselves and will not change throughout the synthesis or duplication of DNA. Therefore, to complete the complementary strand described in the assignment we must match the letter given with its corresponding base pair, using this rule of DNA.
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