Question

1.The role of meiosis in Mendel's law of segregation is that

A.it allows crossing over to occur.

B.it allows genes to be duplicated.

C.it separates sister chromatids and exact copies of genes.

D.it separates homologous chromosomes and therefore gene alleles into separate gametes.

E.it ensures that both alleles of a gene end up in the same gamete

2. Which of the following events takes place during anaphase I of meiosis?

A.sister chromatids split and move toward opposite poles of the cell

B.the nuclear envelope dissolves

C.homologous pairs split and move toward opposite poles of the cell

D.chromosome tetrads align in the center of the cell

E.spindle fibers attach to chromosomes

Answer 1

Answer 1. D it separates homologous chromosomes and therefore gene alleles into separate gametes.

Reason - law of segregation is based on the fact that two factors of a character present in a individual do not get mixed up and both traits are recovered. During gamete or spore formation, traits of a pair separate or segregate from each other, so that a gamete carries only one trait of a character.

Answer2: C Homologous pairs split and move toward opposite poles of the cell.

Reason- During anaphase - I spindle fibres pull humologous chromosomes towards the opposite poles of the spindle. This process of separation is termed as disjunction. It is the stage in which chromosomes number becomes half.

#IF YOU FOUND MY ANSWER TO BE HELPFUL PLEASE LEAVE A LIKE. THANK YOU.