Multiple choice

When sperm (male gamete) having X chromosome fuses with ovum (female gamete), then the offspring will be

  1. male

  2. female

  3. either male or female

  4. can not be predicted
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Human sex is determined by chromosome combinations: females have XX and males have XY. When an X-bearing sperm fertilizes an X-bearing ovum (always X), the resulting zygote is XX and develops as female. Only when a Y-bearing sperm fertilizes the ovum does the result be XY (male).

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