Genetic Variation in Offspring — NEET Biology
📚 Practice ConceptGiven that they do, are the offspring identical to their parents? Or do they show differences in some of their characteristics? Have you ever wondered why siblings sometimes look so similar to each other? Or sometimes even so different?
Which of the following statements are correct regarding the variation in polygenic traits like skin tone among offspring from the same parents? S1: Different skin tones among siblings are primarily due to traits like Mendelian single gene dominance. S2: Polygenic inheritance, where multiple genes contribute to skin colour, is a key factor in phenotypic variation among offspring. S3: Recombination events during meiosis in parents create diverse combinations of alleles, leading to a continuous range of phenotypes in offspring. S4: Environmental factors alone, without genetic variation, can explain the wide spectrum of skin tones observed within a single family. S5: The absence of crossing over at centromere is the main reason for phenotypic differences in polygenic traits.
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