D is the symbol for the dark-haired allele; d is the symbol for the blond-haired allele. Four children have the following allele pairs: Kevin has DD, Chris has Dd, Kelly has dD, and Vince has dd. Which child is considered recessive homozygous and has blond hair?

What happens during interphase? (1)the nucleus grows to its full size. (2)the cell grows to its full size. (3)the nucleus divides into two nuclei. (4)the cell divides into two cells.

Plz fast biotechnology is a growing field of applied biology. many crops such as corn have been engineered to be resistant to herbicides. therefore farmers can spray these chemicals to kill weeds growing near the crop without worries of killing the crop itself how does this type of biotechnology work? a. by changing the genetic make up of the crops. b. by causing the crops to kill the weeds. c. by changing the type of crops used. d. by changing the location of the crops.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?