Which of the following contains the greatest number of totipotent stem cells? a. a blastocyst b. an adult c. a 5-week-old embryo d. a fertilized egg cell

D. a fertilized egg cell

Totipotent stem cells are cells which are formed when a sperm fertilizes a egg  resulting in a zygote. A zygote being a totipotent stem cell divides many times to develop specialized cells in a new human being. Therefore, a fertilized egg cell has greatest number of totipotent stem cells.

D  a fertilized egg cell

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).