The pedigree chart below shows the individuals in a family who exhibit a certain trait. based on the info in the chart, which of the following provides the best evidence that this is a recessive trait?

a. couple 3-4 in the 2nd generation produced children who are identical twins.

b. couple 1-2 in the second generation produced children who do show the trait.

c. couple 1-2 in the 1st generation produced children who do show the trait.

d. couple 3-4 in the 2nd generation produced children who do not show the trait.

What is the role of fadh2 in cellular respiration

Aresearcher designed an investigation to test what effect eating different types of food would have on blood insulin levels. she selected 10 male subjects who were all 25 years of age and in good health. the experiment took place over 3 days. at 8: 00 a. m. on each day, the subjects ate a meal consisting of only 1 type of food. they had their blood insulin levels measured after consuming the meal. on day 1 they ate a high fat diet, on day 2 they ate a high protein diet, and on day 3 they ate a high sugar diel what is the independent variable in this experiment? a the age of the subjects b the blood insulin level c the type of food consumed d the time of day the meal was consumed

Ture or false evidence for evolution includes millions of fossils