Blog

Closely related species are similar to each other because they

Reduction of chromosome number by half occurs during

Natural selection usually operates at the level of the

How can ancestral characters be distinguished from derived characters?

When all females have high fecundity, a population can be driven to extinction. A population in which all females have high fecundity occurs because of

The alleles that are carried by an individual for a particular gene make up the __________, while the visual characteristics of those alleles is the __________.

During 1976 on the Galápagos Island of Daphne Major, Peter and Rosemary Grant found evidence of natural selection by adaptation when they observed that

When can we say a population has reached a point of fixation?

In humans, brown eyes (B) are a dominant trait, while blue eyes (b) are a recessive trait. Would a parent with blue eyes be able to have a child who also has blue eyes?

Ancestral giraffes had short necks. The fossil record shows us that there was a gradual lengthening of giraffe necks over many generations. This is an example of