What is the general order of genes involved in determining early Drosophila development?

What will be an ideal response?


maternal effect, gap, pair-rule, segment-polarity, selector (homeotic)

Biology & Microbiology

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Suppose a DNA replication error is not corrected. After two cell divisions, how many of the four daughter cells

contain this mutation (assuming that the mistake was never corrected)?

a. none

b. one c. two d. three e. four

Biology & Microbiology

Which molecule is the most abundant in the extracellular matrix of connective tissues?

a. collagen b. cholesterol c. fibronectin d. albumin e. elastin

Biology & Microbiology

Which current carries warm water northward in the western Atlantic ocean?

1.Canary current 2.Caribbean current 3.Gulf Stream 4.North Atlantic current

Biology & Microbiology

What is incorrect about the ostrich?

a. It weighs over 300 pounds. b. It is featherless. c. It is flightless. d. It has a four-chambered heart. e. It is a runner.

Biology & Microbiology