Which phrase best describes the process of crossing over? A: Pairs of homologous chromosomes exchange segments.
B: Pairs of sister chromatids exchange segments.
C: Pairs of homologous chromosomes become linked.
D: Pairs of sister chromatids become linked.

A

Explanation:

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).