In a dihybrid cross that shows complete linkage, which of the following would you expect from a test cross between a cis configuration wild type heterozygote for both genes and a double mutant?
a) Only the wild type phenotypes
b) Only the mutant phenotypes
c) 1/2 of the offspring will have both of the wild type phenotypes and 1/2 will have both of the mutant phenotypes.
d) 9:3:3:1 ratio of phenotypes
Ans: c) 1/2 of the offspring will have both of the wild type phenotypes and 1/2 will have both of the mutant phenotypes.
You might also like to view...
Which of the following would most likely result in a bottleneck event?
A. A small population of geese migrates and joins a large flock of the same species. The two groups subsequently begin interbreeding. B. A mutation occurs in an individual poison ivy plant, doubling the number of seeds it produces. The mutation is inherited by future generations. C. A hurricane blows through a coastal swamp inhabited by an apple snail population. The hurricane drastically changes the hydrology of the swamp, killing 98% of the apple snails. D. A population of broomsedge grass is studied and determined to be in Hardy-Weinberg equilibrium. E. Two populations of lizards were separated for many years by a river. The river's course has been diverted and migration between the two lizard populations can now occur.
In which of the types of hearts is oxygen-rich
and oxygen-poor blood mixed?
a. two-chambered b. three-chambered c. four-chambered d. two and three-chambered e. all three types of hearts
The state of Texas passed a law to require
a. AED devices at all high school sporting events. b. AED training for all teachers in the state. c. CPR training for all parents of high school athletes. d. all AED’s to be tested on an animal prior to use in humans. e. none of these.
Which of the following are the only extant animals that descended directly from dinosaurs?
A) lizards B) crocodiles C) birds D) tuataras