If two offspring receive hereditary information from the same parental sources yet look different, what is the deepest reason?
Answer and explanation
Correct answer: Different hereditary combinations formed in gametes
Heredity transfers genetic information from both parents, but sexual reproduction does not give every offspring exactly the same combination. During meiosis and fertilisation, different alleles can enter gametes and unite in different pairs. These combinations influence the traits expressed by each offspring, while environment may also contribute to observable differences. Therefore option A is correct; chromosome absence and lack of parental contribution are biologically false, and food alone does not determine every trait.
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What is the correct answer to this question?
Different hereditary combinations formed in gametes
Why is this the correct answer?
Heredity transfers genetic information from both parents, but sexual reproduction does not give every offspring exactly the same combination. During meiosis and fertilisation, different alleles can enter gametes and unite in different pairs. These combinations influence the traits expressed by each offspring, while environment may also contribute to observable differences. Therefore option A is correct; chromosome absence and lack of parental contribution are biologically false, and food alone does not determine every trait.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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