Select the correct answers to the questions from the given options. (Do not copy the questions, write the correct answer only.)
A zygote which has Y chromosome inherited from the father will develop into a:
Topic: Sex determination
Try it
Pick an option and check your answer. The full worked answer is below either way.
Answer
(d) Boy.
A BOY. Sex is determined entirely by the chromosome received from the FATHER.
The mother is XX, so every ovum carries an X — she has nothing else to give. The father is XY, so half his sperms carry X and half carry Y. X (mother) + X (father) = XX = GIRL X (mother) + Y (father) = XY = BOY
Since the Y can only have come from the father, and the mother contributed an X, the zygote must be XY — a boy. Option (a) is wrong because the mother’s contribution is always X and cannot change the outcome.
THE SOCIAL POINT worth knowing, because examiners raise it: in India women have often been blamed for the sex of a child. Biologically that is impossible — the father determines it, and the chance is 50:50 at every conception.
Boy.