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प्रश्न
A certain couple got four daughters in a sequence and no son. Does it mean that the husband does not produce Y-chromosome bearing sperms? Explain. What is the chance of this couple having a daughter?
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उत्तर
Daughter or son is a matter of chance for Y- or X-chromosome carrying sperm to fertilize the egg. It is always 50% The couple got four daughters as a matter of chance encounter of the X-chromosome carrying sperm fertilizing the eggs. The chance of the couple getting another daughter is again 50% (so is for the son).
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संबंधित प्रश्न
Differentiate between the following:
Dominance and Recessive
Answer the following question.
Write the basis on which Alfred Sturtevant explained gene mapping.
A pure tall plant (TT) is crossed with the pure dwarf plant (tt), what would be the F1 and F2 generations? Explain.
Differentiate between inherited and acquired characters. Give one example for each type.
Given below is a schematic representation of the inheritance of the shape of the seeds of garden peas. Answer the questions that follow:
- Which is the dominant and recessive allele of the trait?
- What does the ratio 3 : 1 in the F2 generation represent?
- State Mendel's Law of Dominance.
Monohybrid crosses are useful in demonstrating which of the following laws of inheritance suggested by Mendel?
What is the genotype of the pure tall plant selected in the experimental sequence?
Which self-pollination is performed to obtain the F2 generation?
What is the genotypic ratio in F2?
