Abarley plant has seven pairs of chromosomes. how many unique combinations of chromosomes can result from meiosis in barley?

128 different combinations of chromosomes

Explanation:

The chances of genetic diversity or variation is increased by meiosis in sexually reproducing organisms like barley plant. This is due to a phenomenon called CROSSING-OVER, that occurs during meiosis I precisely, where chromosomes are recombined in a way that is different from the parent's, hereby promoting genetic variation among species.

The number of possible combinations of chromosomes in the resulting gametes/daughter cells can be calculated using a simple formula: 2^n where n is the number of haploid chromosomes. In the case of this wheat plant that contains 7 pairs of chromosomes or 14 chromosomes in its diploid state. It will undergo meiosis and produce haploid gametes with chromosome number of 7.

Hence, 2^7 = 128. Therefore, there are 128 possible different combinations of chromosomes in the gametes.

answer: a) a compound microscope has a greater magnification ability than a simple microscope.

explanation: