Inheritance

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In this video, Salman Khan of Khan Academy explains sex-linked traits.


Biology Midterm Exam

In this video, Salman Khan of Khan Academy explains DNA.

This is a simple, but clean diagram of asexual reproduction of cells. You can clearly see chromosomes, as well as easily define the different stages.

This is a great website for students just beginning to learn about meiosis. There are no ads, and the site is sharp, clean, with great diagrams and explanations.

An extensive online interactive resource for learning about various aspects of biology.

Which nucleic acid carries amino acid molecules to the ribosomes?

codominance and incomplete dominance. A=black, a=white, Aa=gray. A gray mouse crossed with a white mouse.

The allele for the hair pattern called 'widow's peak' is dominant over the allele for no 'widow's peak.' In a population of 1,000 individuals, 510 show the dominant phenotype. How many individuals would you expect of each of the possible three genotypes for this trait?

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