In a certain variety of plants, a cross between a redflowered
plant and a white-flowered plant produced
an all-red flower F1. In the F2 there were 140 red, 50
cream, and 65 white.
(a) Offer an explanation for this F2 ratio.
(b) What ratio would be produced in a testcross
of the F1 hybrid?
(c) What ratio would be produced if all the white
F2 plants were crossed among themselves? What will be an ideal response?
Answer: (a)R-red, r-cream, A-color, a-albino; 9 R__A__ red, 3 rr
A__ cream, 4__ aa white
(b)1/4 red, 1/4 cream, 1/2 white
(c) all offspring would be white because all would be
__aa
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Indicate whether the statement is true or false.
Which of the following is a major distinction between a transposon and a retrotransposon?
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Yeast are true eukaryotes with a nucleus, mitochondria, and other membrane bound organelles including flagella.
Answer the following statement true (T) or false (F)
Based on the animation, how many electron carriers are reduced in the Krebs cycle only?
a. Six b. Four c. Five d. Three