Which statement describes the condition of the heart at the point indicated in the electrocardiogram? The atria are contracting and pushing blood into the bottom ventricles of the heart.
The ventricles are contracting and pushing blood out of the heart to the lungs and body.
The valves between the atria and ventricles close, producing the second heartbeat.
The valves of the aorta and pulmonary artery close, producing the second heartbeat.

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4

In pea plants, yellow seed color (y) is dominant and green seed color (y) is recessive. based on the punnett squares, what are the chances that the offspring in the second generation will have green seeds?

The mixture of sperm and fluids from the seminal vesicles, prostate gland, and cowper's glands is called