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.
The answer for this is ricket.
Ricket happens because there is a lack of calcium absorption, and vitamin d has effects on this because vitamin d helps the absorption of calcium. Calcium is a kind of mineral necessary for human body as it can strengthen bones and teeth. Lack of these can lead to soft bones, and especially in children, they may get ricket. Ricket is where the legs bend outwards.
Aside from rickets, there may be other possible deficiency symptoms and diseases such as weak muscles and pain.
Because you wouldn’t want to harm others and they would want to know what there putting
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aM deSpAraTE
