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Biology

Across
a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring
Theory of how the universe began
one of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.
the process whereby organisms better adapted to their environment tend to survive and produce more offspring
The change in inherited characteristics within populations over generations
most important, powerful, or influential
What we use to measure the age of the universe
Down
a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.
a distinguishing quality or characteristic
a large naturally occurring community of flora and fauna occupying a major habitat
One of the first organisms on Earth
deoxyribonucleic acid
Father of Evolution
an expert in or student of natural history.
relating to or denoting heritable characteristics controlled by genes that are expressed in offspring only when inherited from both parents