Explain how alteration in DNA sequences contribute to variation that can be subject to natural selection....

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Biology

Explain how alteration in DNA sequences contribute to variationthat can be subject to natural selection. (Please use these termsin your answer)
Chromosome number
Chromosomal human disorders: down syndrome, turner syndrome
Natural selection
Horizontal acquisitionsÂ Â
Naked DNA
Viral transmission
Conjugation
Transposition
Viruses recombination
Meiosis(in various organisms)Â Â

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There are many ways of alteration in DNA sequences which contribute to variation and therefore cause evolution These alteration can be either due to an increase or decrease in the number of chromosomes or exchange in the nucleotides sequence of the DNA itself The change in the number of chromosomes is lethal in case of human beings If there are three copies of a chromosome then it is called as trisomy For example patau syndrome which is caused due to the presence of three copies of chromosome number 18 Monosomy is the presence of only single copy of a chromosome For example Turner syndrome which is caused due to the single copy of X See Answer

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