Multiple Choice
In a population where the frequency of the recessive allele (q) is 0.3, what percentage of individuals are expected to be heterozygous according to Hardy-Weinberg equilibrium?
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3. Extensions to Mendelian Inheritance
Understanding Independent Assortment
Multiple Choice
Independent assortment of chromosomes is a result of _____.
A
the random orientation of homologous chromosome pairs during metaphase I of meiosis
B
DNA replication during the S phase of the cell cycle
C
the separation of sister chromatids during anaphase II
D
crossing over between non-sister chromatids during prophase I
Verified step by step guidance1
Understand that independent assortment refers to how different genes independently separate from one another when reproductive cells develop.
Recall the stages of meiosis, focusing on metaphase I, where homologous chromosome pairs line up at the cell's equator.
Recognize that during metaphase I, the orientation of each homologous chromosome pair is random and independent of other pairs, which leads to different combinations of chromosomes in gametes.
Note that DNA replication during the S phase occurs before meiosis and does not cause independent assortment; it simply duplicates chromosomes.
Understand that crossing over during prophase I creates genetic variation but is a separate process from independent assortment, and the separation of sister chromatids during anaphase II is related to the distribution of chromatids, not independent assortment.
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