Each pair of chromosomes contain _ variants of a gene. I don't know what to put in the blank?
Please help me

Twin boys have girlfriends one of the couples have a baby would the dna of the lil baby be the same as the couples dna bc the boys are identical twins

Explain how scientists use geologic time to determine the age of landforms.

What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material