Genes on different chromosomes ___________________ during meiosis. Genes that are very close together on the same chromosome are _________
A. do not assort independently; linked
B. assort independently; linked
C. do not assort independently; unrelated
D. assort independently; unrelated
B
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What determines the direction of the voltage change that occurs at the postsynaptic membrane?
A. the type of neurotransmitter B. the type of second messenger system used C. the type(s) of ions that travel through opened channels D. the number of ion channels on the postsynaptic membrane
Unsaturated tails of lipids
a. are hydrophilic. b. are unstable and tend to break apart. c. interact with the tails of other phsopholipids . d. will break whenever exposed to phosphate ions. e. have all of these attributes.
What are trans fats?
a. hydrogenated vegetable oils that have been identified with health risks b. fats made from cholesterol that are components of plaques in the walls of blood vessels. c. fats that are derived from animal sources and are associated with cardiovascular disease d. fats that contain trans double bonds and may contribute to atherosclerosis e. polyunsaturated fats produced by removing H from fatty acids and forming cis double bonds
The trait for medium-sized leaves in iris is determined by the genetic condition PP?. Plants with large leaves are PP, whereas plants with small leaves are P?P?. The trait for red flowers is controlled by the genes RR, pink by RR?, and white by
R?R?. A cross is made between two plants each with medium-sized leaves and pink flowers. If they produce 320 seedlings, what would be the expected phenotypes, and in what numbers would they be expected? Assume no linkage. A) 40 large, red; 20 medium, red; 40 small, red; 20 large, pink; 80 medium, pink; 20 small, pink; 40 large, white; 20 medium, white; 40 small, white B) 20 large, red; 40 medium, red; 20 small, red; 80 large, pink; 40 medium, pink; 40 small, pink; 20 large, white; 40 medium, white; 20 small, white C) 80 large, red; 40 medium, red; 20 small, red; 40 large, pink; 20 medium, pink; 40 small, pink; 20 large, white; 40 medium, white; 20 small, white D) 20 large, red; 40 medium, red; 20 small, red; 40 large, pink; 80 medium, pink; 40 small, pink; 20 large, white; 40 medium, white; 20 small, white E) 35 large, red; 35 medium, red; 35 small, red; 35 large, pink; 35 medium, pink; 35 small, pink; 35 large, white; 35 medium, white; 35 small, white