Answer: Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
By the end of meiosis, the resulting reproductive cells, or gametes, each have 23 genetically unique chromosomes. The overall process of meiosis produces four daughter cells from one single parent cell.
Explanation:
During meiosis, homologous chromosomes (1 from each parent) pair along their lengths. The chromosomes cross over at points called chiasma. At each chiasma, the chromosomes break and rejoin, trading some of their genes. This recombination results in genetic variation.
Answer:
The mutations occur at a rate of 0.56 base changes every 1 billion years. If this rate stays consistent, the mutation rate can be used to determine when different lineages of a particular species split
The difference between plant and animals is that plants take carbon dioxide while animals breathe in that oxygen and breathe back out carbon dioxide
Answer:
Thank you! :) you are awesome and happy holidays to you!
Explanation:
Ya your stomach hurts when something else happens and that REALLY sucks lol!
Although its not really you stomach and more like intestines but still REALY sucks.
Bacteria builds immunities so that your immune system becomes stronger and can also help in the break down of other materials
