If a DNA strand has a base sequence TCA, its complementary strand must be?

Which of the following is true in blood transfusion?

The mutation theory of organic evolution was propounded by?

If both parents are heterozygous for a trait. the probability that an offspring will be recessive for that trait is?

In humans, pointed eyebrows (B) is a dominant trait over smooth eyebrows (b). A student and the mother have smooth eyebrows while the father has pointed eyebrows. What is the genotype of the father?