8. Hormones produced by the testes control the expression of traits for
(1) hair color and eye color
(2) beard development and number of fingers
(3) hair color and voice quality
(4) voice quality and beard development

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion

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).

the fossil record provides evidence of a common ancestor to many species.