Answer:
1) the genes and chromosomes do not double after each generations because parental sex cells are haploid and only contain one set of chromosomes. During fertilization the two cells fuse to form a diploid zygote with two copies of genes and chromosomes. For example a normal human has 46 chromosomes (2 copies of 23 chromosomes) during reproduction gametes which contain 23 chromosomes (haploid) fuse to form an offspring with the correct number of chromosomes ( 23 + 23 = 46).
2) offspring only receive one set of chromosomes from each parent so to maintain the chromosome number of humans. If this did not happen you would not be the same species.
Answer: first photo in my opinion would be d or c, but mostly d!
2nd photo would be either a!
hope i helped!
Answer:
c lower oxygen levels
Explanation:
the higher up the person is the closer to the atmosphere so there is less oxygen
Answer:
after the oocyte- estrogen levels consistently rise
Mature egg- the progesterone levels are high
Between the ovary and corpus lutem- luteinizing hormone levels are high
Explanation:
Roan fur in cattle, in which white and red hair is equally expressed.
