Independent Assortment, Crossing Over, and Genetic Variation (OCR A-Level Biology A): Quizzes
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Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is independent assortment?
What is independent assortment?
Random distribution of chromosomes
During which stage of meiosis does crossing over occur?
During which stage of meiosis does crossing over occur?
Prophase I
What formula calculates possible chromosome combinations from independent assortment?
What formula calculates possible chromosome combinations from independent assortment?
2^n
How many gamete combinations can humans produce via independent assortment alone?
How many gamete combinations can humans produce via independent assortment alone?
Over 8 million
During which meiotic division does independent assortment operate?
During which meiotic division does independent assortment operate?
First meiotic division (meiosis I)
What are chiasmata?
What are chiasmata?
Points where chromatids cross
What does crossing over exchange between chromosomes?
What does crossing over exchange between chromosomes?
Genetic material between non-sisters
How many eggs do females release across their reproductive lifetime?
How many eggs do females release across their reproductive lifetime?
Approximately 450
What is the probability of producing identical gametes via independent assortment alone?
What is the probability of producing identical gametes via independent assortment alone?
Approximately 1 in 20 million
What structure forms when homologous chromosomes undergo synapsis?
What structure forms when homologous chromosomes undergo synapsis?
A bivalent