Parents that are heterozygous for having freckles (dominant) are crossed. Which represents the ratio of their offspring?

Twenty-five percent have freckles.

Twenty-five percent are Ff.

Seventy-five percent have freckles.

Seventy-five percent are Ff.

20. in humans, freckles are dominant to no freckles. trey has no freckles and his wife anna grace has freckles, but her dad doesn't. they want to know what percentage of their kids would look like trey. show a punnett square to support your answer.

In the diagram below, which organelle is a ribosome, which combines amino acids and produces proteins? оооо

An adult inhales about 6.0×10−4 m3 of fresh air during a breath. only 20% of fresh air is oxygen. assume the pressure in the lungs is 1.0×105 paand the air is at a temperature of 300 k. how many oxygen molecules are in each breath? a. 1.4x10^23 b. 2.9x10^21 c. 4.9x10^-4 d. 2.9 x10^25