What is the correct order of expression of the genes listed below in the determination of segmentation in Drosophila?
(1) Segment polarity genes
(2) Hox genes
(3) Gap genes
(4) Pair rule genes
A: 2, 3, 1, 4
B: 1, 2, 3, 4
C: 3, 1, 4, 2
D: 3, 4, 1, 2
E: 4, 3, 1, 2
Ans: D: 3, 4, 1, 2
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Activated genes can be inactivated by reversing histone modification during a process called ____
a. chromatin remodeling b. histone remodeling c. chromatin interference d. interference remodeling e. histone interference
A genomic ________ is a sufficiently large collection of recombinant DNA molecules in which the inserted sequences together represent the entire genome of an organism.
Fill in the blank(s) with the appropriate word(s).
Which germ layer gives rise to the muscle layer of the uterus?
A) Endoderm B) Ectoderm C) Mesoderm
What is the Allee effect?
A. when fitness increases independently of population size B. when fitness and growth rates increase with decreasing population size C. when fitness and growth rates increase with increasing population size D. when growth rates increase independently of population size