You have three jars containing marbles, as follows:jar 1 600 red and 400 whitejar 2 900 blue and 100 whitejar 3 10 green and 990 whitea. If you blindly select one marble from each jar,calculate the probability of obtaining(1) a red, a blue, and a green.(2) three whites.(3) a red, a green, and a white.(4) a red and two whites.(5) a color and two whites.(6) at least one white.b. In a certain plant, R = red and r = white. You self a redR/r heterozygote with the express purpose of obtaining awhite plant for an experiment. What minimum numberof seeds do you have to grow to be at least 95 percentcertain of obtaining at least one white individual?c. When a woman is injected with an egg fertilized invitro, the probability of its implanting successfully is20 percent. If a woman is injected with five eggssimultaneously, what is the probability that she willbecome pregnant? (Part c is from Margaret Holm.)
Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
You have three jars containing marbles, as follows:
jar 1 600 red and 400 white
jar 2 900 blue and 100 white
jar 3 10 green and 990 white
a. If you blindly select one marble from each jar,
calculate the probability of obtaining
(1) a red, a blue, and a green.
(2) three whites.
(3) a red, a green, and a white.
(4) a red and two whites.
(5) a color and two whites.
(6) at least one white.
b. In a certain plant, R = red and r = white. You self a red
R/r heterozygote with the express purpose of obtaining a
white plant for an experiment. What minimum number
of seeds do you have to grow to be at least 95 percent
certain of obtaining at least one white individual?
c. When a woman is injected with an egg fertilized in
vitro, the probability of its implanting successfully is
20 percent. If a woman is injected with five eggs
simultaneously, what is the probability that she will
become pregnant? (Part c is from Margaret Holm.)
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