Assume that a cross is made between AaBb and aabb plants and that the offspring occur in the following numbers: 106 AaBb, 48 Aabb, 52 aaBb, 94 aabb. These results are consistent with ________
A) linkage with approximately 33 map units between the two gene loci
B) sex-linked inheritance with 30 percent crossing over
C) 100 percent recombination
D) linkage with 50 percent crossing over
E) independent assortment
A
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Which of the following regions produces hormones that are secreted by the pituitary gland?
A. cerebrum B. cerebellum C. thalamus D. hypothalamus E. medulla oblongata
Which of the following is NOT true of
homeotic genes?
a. they control the development of body parts b. they are highly conserved genes c. they are specific to specific species d. PAX6 is an example of one e. they have been discovered by knockout experiments
The per capita rate at which predators consume prey is assumed to increase ________ with the number of prey
Fill in the blank(s) with correct word
Isotopes of an element differ due to the number of
A. neutrinos. B. electrons. C. both protons and electrons. D. protons. E. neutrons.