Need urgent help with this homework question. Why do siblings, who share the same parents, look similar but not identical. Refer to the opportunities for genetic variability in meiosis in the explanation. (Grade 11 Bio)
Need urgent help with this homework question.
Why do siblings, who share the same parents, look similar but not identical. Refer to the opportunities for genetic variability in meiosis in the explanation.
(Grade 11 Bio)
Gametes formed during meiosis are haploid and contains only one set of the chromosome from each parent. These two gamete fuses to form a single embryo, which contains the actual number of chromosomes the same as the parent, called a diploid chromosome, where the genetic variations arise.
When cells divide during meiosis, homologous chromosomes are randomly distributed, separating, and segregating independently of each other. This is called independent assortment. It results in gametes that have unique combinations of chromosomes.
Each gamete formed is unique and when two gametes unite to produce an offspring, millions of possible gametes will decide the diversity. This is likely to be a matter of chance and happens due to random fertilization of two unique gametes.
Crossing over during meiosis is also one of the reasons to have diversity.
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