Mutations<span> lead to </span>genetic variation<span> by making random changes in an organism's genetic code. This can </span>causes<span> a different protein to be created or none at all.</span>
<span>Stomach acids try to inactivate the bacteria, the body in general produces antibodies to fight the infection and mobilizes white blood cells to destroy the bacteria.</span>
Answer:
40 chromosomes, 20 chromosomes, 2 chromatids, haploid
Explanation:
Mitosis is a type of cell division that results in two identical daughter cells with the same number of chromosomes as the parent cell. The fish is a diploid with 40 chromosomes (80 chromatids), after the separation of sister chromatids during the anaphase of mitosis, each sister chromatid becomes a chromosome i.e 40 chromatids (chromosome) each moves to the opposite poles and after the cell divides (cytokinesis), each daughter cell will have 40chromosomes each.
Meiosis is a type of cell division that results in four daughter cells with each having half of the parental number of chromosomes. It involves two divisions; Meiosis I and Meiosis II
In meiosis I, homologous chromosomes lie side by side to form a structure called tetrad or bivalent consisting of 4 chromatids. During anaphase I, 20 chromosomes are pulled apart to each pole with each chromosome containing 2 chromatids. After cytokinesis in meiosis I, each of the two cells will have 20 chromosomes (40 chromatids) i.e 1 chromosome = 2 chromatids
At the end of meiosis II, which is similar to mitosis, chromatids are pulled apart and each becomes a chromosome, meaning 20 chromatids will be separated to each pole and become 20 chromosomes in each cell after cytokinesis. Since the parental organism was a diploid with 40 chromosomes, and the resulting daughter cells now have 20 chromosomes each, it shows that the chromosomal number has been reduced by half. 2n ---- n
Diploid organism produce haploid daughter cells
Answer:
Introns are crucial because the protein repertoire or variety is greatly enhanced by alternative splicing in which introns take partly important roles. Alternative splicing is a controlled molecular mechanism producing multiple variant proteins from a single gene in a eukaryotic cell.
Explanation:
Answer:
Radiometric dating for the analysis of isotopes in the fossil.
Explanation:
Radiometric dating can be used to determine the precise age of a fossil by measuring isotoped decay within tge fossil or the surrounding rock in contact with it.