Describe how maternal effect genes and segmentation genes work together in the early embryonic

stages of Drosophila. What will be an ideal response?


Concepts to Consider: Maternal effect genes determine anterior-posterior and dorso-ventral polarity
of the embryo by producing gradients of certain chemicals called morphogens. Segmentation genes
then respond to the concentration of morphogens to produce segmentation.

Biology & Microbiology

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Inflammation is a nonspecific defensive reaction to a tissue injury.

Answer the following statement true (T) or false (F)

Biology & Microbiology

The Aniridia gene in humans is involved in eye formation. Although eye development is very different in flies, this gene is highly conserved. What is the Drosophila homolog of Aniridia?

A) eyeless B) Pax-6 C) noeye D) ommatidia

Biology & Microbiology

The HeLa cell line was isolated from a _____

a. chimpanzee b. rat c. human d. guinea pig e. dog

Biology & Microbiology

If a population of 5,000 zebras is growing logistically and has a carrying capacity of 10,000, what would the per capita rate of increase be if the population grew by 50 zebras in 1 year?

A) 0.2 B) 0.1 C) 0.02 D) 0.01

Biology & Microbiology