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Biology · May / June 2019 · Paper 11 · Question 38

5090Inheritance

Which row shows the sex chromosomes when parents have a baby boy?

  1. Ain the egg cell: X, in the sperm cell: X, in the zygote: XX
  2. Bin the egg cell: X, in the sperm cell: Y, in the zygote: XY
  3. Cin the egg cell: Y, in the sperm cell: X, in the zygote: XY
  4. Din the egg cell: Y, in the sperm cell: Y, in the zygote: YY

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Correct answer: B. in the egg cell: X, in the sperm cell: Y, in the zygote: XY

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