when do crossing-over and independent assortment of chromosomes occur?

What will be an ideal response?


during meiosis I

Biology & Microbiology

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The tropical supralittoral zone immersed only at the highest spring tides is the:

a. brown. b. white. c. gray. d. black. e. yellow.

Biology & Microbiology

Explain why a food web gives a better picture of a community than does a food chain

What will be an ideal response?

Biology & Microbiology

Explain what has to happen to embryonic stem cells from a donor before they are used in a patient as a therapy.

What will be an ideal response?

Biology & Microbiology

Which of the following does not signify amphibolism?

Biology & Microbiology