A particular flower can be purple, blue, red, or white. A pure-breeding purple plant is crossed with a pure-breeding white plant and the F1 are then crossed to produce an F2 generation. Which phenotypic ratio in the F2 may indicate that flower color in these plants is controlled by two genes that interact additively?
A) 3:1
B) 1:2:1
C) 9:3:3:1
D) 9:3:4
E) 15:1
C) 9:3:3:1
You might also like to view...
When threshold potential is reached, ____
a. the activation gates of Na+ channels open b. the inactivation gates of Na+ channels open c. the activation gates of K+ channels open d. the inactivation gates of Na+ channels open e. Na+/K+ active transport pumps are activated
Four of the five answers listed below are sources of variation in a population. Select the exception
a. mutation b. sexual reproduction c. crossing over d. independent assortment e. law of dominance
Spermatogenesis is governed by _____
a. GnRH b. luteinizing hormone only c. luteinizing hormone and follicle stimulating hormone d. follicle stimulating hormone only e. GnRH, luteinizing hormone, and Sertoli cells
Split genes
A. require spliceosomes to excise introns and then join exons. B. have introns located only at the beginning and end of a coding region. C. are common in prokaryotes and eukaryotes. D. only have exons initially transcribed to mRNA. E. All of these choices are correct.