Multiple choice

Which of the following statements regarding the crossing over is false?

  1. It involves the exchange of genetic material.

  2. It does not causes variations .

  3. It helps in the chromosomal mapping.

  4. It produces new individuals having new combinations of traits.
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B Correct answer
Explanation

This leads to variations in the population. Through the maternal gametes (ova) and paternal gametes (sperms), hereditary traits (characters) are passed on to child from parents. Genes are linearly arranged in chromosomes which are the carriers of hereditary traits. With the crossing over of two parental chromosome segments, a child inherits some of the traits from the mother and some from the father. This is why; two children from the same parents resemble each other in some characters and differ in others.

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