CBSE 2025 · Region 4 · Set 1 · Q24 · 2 marks
Explain with the help of a flow chart that in human beings father is responsible for the sex (male or female) of the child.
Marking-scheme solution
Flowchart
If a sperm carrying X chromosomes fertilizes an ovum which carries X chromosome, then the child born will be a girl.
If a sperm carrying Y chromosome fertilizes an ovum which carries XChromosome, then the child born will be a boy.
If a sperm carrying X chromosomes fertilizes an ovum which carries X chromosome, then the child born will be a girl.
If a sperm carrying Y chromosome fertilizes an ovum which carries XChromosome, then the child born will be a boy.HereditySex DeterminationApplyvery_short_answermedium
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CBSE Class 10 Science past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.