A human zygote should have _____ chromosomes inside.

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Study for the 9th Grade Biology SOL Test. Prepare with flashcards and multiple choice questions, each featuring hints and explanations. Get ready for your exam!

Multiple Choice

A human zygote should have _____ chromosomes inside.

Explanation:
Human zygotes carry a diploid set of 46 chromosomes. They form when a sperm cell (23 chromosomes) fertilizes an egg cell (23 chromosomes), giving the zygote a total of 46. Remember that the count refers to chromosomes, not chromatids—after DNA replication there are 92 chromatids, but they still comprise 46 chromosomes. So 46 is the correct number for a newly formed human zygote.

Human zygotes carry a diploid set of 46 chromosomes. They form when a sperm cell (23 chromosomes) fertilizes an egg cell (23 chromosomes), giving the zygote a total of 46. Remember that the count refers to chromosomes, not chromatids—after DNA replication there are 92 chromatids, but they still comprise 46 chromosomes. So 46 is the correct number for a newly formed human zygote.

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