Assuming that 50% of the offspring are male and 50% are female, what is the probability of this couple having a son with short index fingers?

An example of a producer would be a:

Which of the following features is used to characterize eukaryotic chromosomes? 

Which of the following events is LEAST likely to occur in a cross involving epistasis by both genes?

If a population’s growth rate decreases as the population size approaches carrying capacity, the population’s growth follows a(n) _________ model.  

In mice, a true-breeding female with a normal spine is crossed to a true-breeding male with a crooked spine. All of the F1 offspring have normal spines. The F1 female offspring are then crossed to true-breeding males with a crooked spine. All of the F2 offspring have normal spines. These are observations are consistent with

Structure that develop for one thing but become useful for something else. 

Biological species consists of groups of ________. 

Two different strains of plant exhibit a recessive phenotype of white flowers. When crossed, they produce offspring with wild-type purple flowers. This phenomenon of obtaining purple flowers is called __________ and it indicates that _________________________________.

When we say that two different genes are linked, this means