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Living Environment Regents August 2010 Question 03 PDF Print E-mail
Friday, 27 May 2011 12:00

Correct answer: (3) Each of these cells contains only half the genetic information necessary for the formation of an offspring.

There are two types of cells in the body, the body cells and the sex cells. Body cells divide by mitosis, while sex cells divide by meiosis. A sex cell undergoing different stages of meiosis is illustrated. This division results in gametes with half the chromosome number of the original cells. When this gamete (sperm) unites with another gamete (egg) through fertilization, their genes would combine to form the genetic information of an offspring.

Incorrect answers:

(1) The cells are produced by mitosis and contain all the genetic information of the father.

Mitosis is a process of cell division that conserves the chromosome number of the original cells by equally allocating replicated chromosomes to each of the daughter cells.

(2) If one of these cells fertilizes an egg, the offspring will be identical to the father.

During fertilization, the haploid gametes (egg and sperm) unite and form a diploid offspring. The genes of the gametes are combined, thus the offspring has a new set of genetic information.

(4) An egg fertilized by one of these cells will develop into a female with the same characteristics as the mother.

When two gametes unite through fertilization, their genes also combine, forming an offspring with a different set of genetic information.
Last Updated on Friday, 27 May 2011 12:10
 

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