Question at position 21 What is a zygote?An unfertilized female gamete produced in the testesA fertilized ovum containing 46 chromosomesA male gamete that matures in the uterusA hormone released to sustain pregnancy

Question

BlackTom AI · Accepted Answer

Exploring the concept in question, we assess what a zygote is and what each option implies.
Option 1: 'An unfertilized female gamete produced in the testes' — this is inaccurate on two counts: first, female gametes (ova) are not produced in the testes but in the ovaries, and second, a zygote is not unfertilized; it results from fertilization.
Option 2: 'A fertilized ovum containing 46 chromosomes' — this is the correct description. A zygote forms when a sperm fertilizes an ovum, combining their genetic material to produce a cell with a full set of chromosomes, typically 46 in humans, establishing the diploid state.
Option 3: 'A male gamete that matures in the uterus' — this is incorrect. Male gametes are sperm, produced in the testes, and they do not mature in the uterus; fertilization involves a sperm entering an ovum, not maturing there.
Option 4: 'A hormone released to sustain pregnancy' — this misidentifies a zygote as a hormone; in fact, a zygote is a new diploid cell formed after fertilization, not a hormone or a signaling molecule.
In summary, the only option that accurately defines a zygote is the fertilized ovum containing 46 chromosomes, since it represents the initial diploid cell resulting from the union of gametes.

Question at position 21 What is a zygote?An unfertilized female gamete produced in the testesA fertilized ovum containing 46 chromosomesA male gamete that matures in the uterusA hormone released to sustain pregnancy单项选择题

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