Question

Crossing over of chromosomes during meiosis leads to

• A. Mutation
• B. Sex determination
• C. New gene combination
• D. Loss of chromosomes

Answer 1

The correct option is C New gene combination

The meiosis occurs in two stages, meiosis I and meiosis II. Meiosis I is characterised by pairing of homologous chromosomes, crossing over between homologous chromosomes and separation of homologous chromosomes, so that each daughter cell produced after meiosis I has one half the chromosome number as compared to the parent cell. The crossing over leads to new gene combination. The new gene combinations are the primary factor responsible for evolution of organisms.

So, the correct answer is option C.