OBJECTIVE LIFE SCIENCE
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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sexual reproduction, mutations
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asexual reproduction, mutations
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biological evolution, genetics
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biological evolution, genetics
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Detailed explanation-1: -mutation. random mating between organisms. random fertilization. crossing over (or recombination) between chromatids of homologous chromosomes during meiosis. 08-Jun-2022
Detailed explanation-2: -The three main sources of genetic variation arising from sexual reproduction are: Crossing over (in prophase I) Random assortment of chromosomes (in metaphase I) Random fusion of gametes from different parents.
Detailed explanation-3: -Mutations, the changes in the sequences of genes in DNA, are one source of genetic variation. Another source is gene flow, or the movement of genes between different groups of organisms. Finally, genetic variation can be a result of sexual reproduction, which leads to the creation of new combinations of genes.
Detailed explanation-4: -Mutations are the original source of genetic variation. A mutation is a permanent alteration to a DNA sequence. De novo (new) mutations occur when there is an error during DNA replication that is not corrected by DNA repair enzymes.
Detailed explanation-5: -For a given population, there are three sources of variation: mutation, recombination and immigration of genes or deletion.