객관식
During meiosis I, can nondisjunction (failure of homologous chromosomes to separate) occur, and what is the consequence if it does?
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9. Mitosis and Meiosis
Meiosis
객관식
During meiosis, gametes contain how many chromosomes compared to body cells (somatic cells)?
A
Half as many chromosomes as somatic cells
B
One-quarter as many chromosomes as somatic cells
C
The same number of chromosomes as somatic cells
D
Twice as many chromosomes as somatic cells
검증된 단계별 안내1
Understand that somatic cells (body cells) are diploid, meaning they contain two sets of chromosomes, one from each parent.
Recall that meiosis is the process that produces gametes (sperm and egg cells), which are haploid cells.
Recognize that haploid cells contain only one set of chromosomes, which is half the number of chromosomes found in diploid somatic cells.
Therefore, during meiosis, the chromosome number is reduced by half to ensure that when fertilization occurs, the resulting zygote has the correct diploid number.
Conclude that gametes contain half as many chromosomes as somatic cells.
