Suppose that allele d produces tiny toes and allele d produces normal toes. a heterozygous male with the dd genotype mates with a homozygous female with the dd genotype. tiny toes is an autosomal dominant trait expressed with 30% penetrance. determine the probability that their offspring will have tiny toes. report your answer as a percentage without decimal points.

The right answer is 15%.

The D allele is dominant, ie in the case of heterozygosity, it is expressed.

When we cross between the male and the female. we will have 50% "Dd" and 50% "dd".

50% (frequency of 0.5) of the descendant will carry the dominant gene but only 30% (frequency of 0.3) among them will express the disease, therefore it is necessary to make the multiplication:

0.5 * 0.3 = 0.15 (equivalent to 15% of the descendence).

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

the correct option is option d