GENETICS AND EVOLUTION
INHERITANCE AND VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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asexual reproduction
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sexual reproduction
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Either A or B
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None of the above
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Detailed explanation-1: -Why do Frogs Paulie and Nicole have so many different traits? Paulie and Nicole both got half their DNA from mom and half from dad, but they got different genetic combinations.
Detailed explanation-2: -Sexual reproduction also results in genetic variation among siblings. When a parent forms a gamete, only one chromosome from each homologous pair is included at random. So, an offspring might inherit a different combination of chromosomes (and alleles) compared to its siblings.
Detailed explanation-3: -Specifically, meiosis creates new combinations of genetic material in each of the four daughter cells. These new combinations result from the exchange of DNA between paired chromosomes. Such exchange means that the gametes produced through meiosis exhibit an amazing range of genetic variation.
Detailed explanation-4: -In other cases, each parent provides a different allele of a given gene, and the offspring is referred to as heterozygous ("hetero” meaning “different") for that allele. Alleles produce phenotypes (or physical versions of a trait) that are either dominant or recessive.