Answer:
Explanation:
The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
If crossing over did not occur during meiosis, there would be less genetic variation within a species. With crossing over, potentially every chromosome could consist of a combination of both maternal and paternal alleles, which, along with random segregation of chromosomes during anaphase II, would result in a nearly limitless number of genetic variations between related individuals and within a species.
Without crossing over, each chromosome would be either maternal or paternal, greatly reducing the number of possible genetic combinations, which would greatly reduce the amount of genetic variation between related individuals and within a species.
And as genetic variation decreases, the species has a very less chance to evolve and adapt as natural selection.
Answer - D
The body's somatic cells have diploid number of chromosomes hence the body cells would have 36 chromosomes. Gametes always have half the number of chromosomes compared to the somatic cells so in this case, gametes would have 18 chromosomes.
Answer:
heat of the Sahara desert
Explanation:
Answer:
It is breathed out of the body by lungs
Explanation:
Bc CO2 is a waste theres no way glucose reused it.
CO2 are gases.
The place where Oxygen in and Co2 out is lungs.