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Spindle microtubules are at their longest during which stage of mitosis?

Dolly, the cloned sheep, had telomeres that ___________________.

Four of the following will stimulate the production of males in water fleas. Which one is the exception?

Cancer cells ____.

Some tumor-causing mutations increase the activity or number of molecules that stimulate cell division. Genes in which such mutations occur are called _______.

DNA doubles or the formation of a double helix (strand) occurs________________.

The variation in traits among and/or within families is due to?

Homologous chromosomes become attached to either ____ in prophase I.

The region of noncoding DNA at the end of a chromosome and proteins that bind to it, protecting the chromosome from end damage.

In which of the following does the environment play a causal role?