1. Which of the following is NOT a reason for genetic variation within the human

Question

1. Which of the following is NOT a reason for genetic variation within the human population?

the random arrangement of homologous chromosomes during metaphase of meiosis I

2. A Punnett square CANNOT be used to determine the possible genetic outcomes for which type of inheritance?

the random fertilization of eggs by sperm the different numbers of maternal and paternal chromosomes an individual may inherit the exchange of genetic material between chromatids in meiosis I

the random arrangement of homologous chromosomes during metaphase of meiosis I

2. A Punnett square CANNOT be used to determine the possible genetic outcomes for which type of inheritance?

incomplete dominance inheritance dominant-recessive inheritance extranuclear inheritance multiple-allele inheritance

Explanation / Answer

1). a). the different numbers of maternal and paternal chromosomes an individual may inherit

In general human body composes of 23 pairs of chromosomes and in turn 46 chromosomes. Egg and sperm contain 23 chromosomes each, means, the offspring receives the same number of chromosomes from each parent. They carry sex chromosomes. They carry genes that contain information for sex determination of a child. A single X-chromosome is present in the human egg.

Randon mating of egg and sperm, chromosomal crossover and reassortment are the causes of genetic diversity among the humans.

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