Science Group
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Science Group
Answer: Meiosis is called reductional division because it halves the chromosome number.
Answer: Meiosis occurs in the reproductive organs where gametes are formed.
Answer: Meiosis consists of two successive divisions: meiosis I and meiosis II.
Answer: One parent cell undergoing meiosis produces four haploid daughter cells.
Answer: Synapsis (pairing of homologous chromosomes) and crossing over occur only in prophase I of meiosis.
Answer: Meiosis halves the chromosome number, so the four daughter cells are haploid (n).
Answer: In meiosis I, homologous chromosomes separate, reducing the chromosome number from 2n to n.
Answer: Meiosis produces haploid gametes such as sperm and egg cells.
Answer: Prophase I is the longest phase of meiosis because synapsis and crossing over take place during it.
Answer: Without meiotic halving, the fusion of two gametes would double the chromosome number each generation.
Answer: Synapsis is the pairing of homologous chromosomes that occurs during prophase I of meiosis.
Answer: Crossing over involves the exchange of segments between non-sister chromatids of homologous chromosomes.
Answer: Homologous chromosomes pair up (synapsis) during prophase I of meiosis.
Answer: Crossing over occurs during prophase I when homologous chromosomes are paired.
Answer: Crossing over occurs during the pachytene substage of prophase I, when chromosomes are fully paired.
Answer: A tetrad is the group of two homologous chromosomes, each with two chromatids, formed during synapsis.
Answer: A tetrad consists of two homologous chromosomes with two chromatids each, making four chromatids.
Answer: In anaphase I, homologous chromosomes separate from each other and move to opposite poles.
Answer: As homologous chromosomes separate in anaphase I, each pole receives one set (n), halving the chromosome number.
Answer: The synaptonemal complex is a protein structure that forms between paired homologous chromosomes during prophase I.