MEK is a protein that has the ability to phosphorylate other proteins (kinase). MEK kinase activity can be turned on and off in response to external cellular cues. A mutation occurs in a somatic cell that results in MEK always being active and phosphorylating its targets. Which of the following answers best describes this mutation and how it would behave in an organism that is heterozygous for the mutation?
Read DetailsTwo organisms are heterozygous at five different loci (AaBbDdEeFf). The loci all independently assort from one another and all alleles of a single gene display a simple dominant/ recessive relationship with one another (A>a, B>b, etc). The two organisms are crossed. a. How many different gametes will be produced by each individual? Enter a number in the blank. [1] b. What fraction of the offspring will have the genotype: aaBbDdEEFf? Enter a fraction in the blank (for example, 1/2). [2] c. What fraction of the offspring will have the have the dominant A, B, and D phenotypes and the recessive e and f phenotypes (A_B_D_eeff)? Enter a fraction in the blank (for example, 1/2). [3]
Read DetailsA particular species of plant can be tall (D) or dwarf (d). Flowers can be either purple (G) or white (g). And, leaves can be smooth (H) or rough (h). All capital alleles are dominant to lower case alleles. The genes D/d and G/g reside on the same chromosome 26 cM apart. H/h, resides on a different chromosome. A pure-breeding tall, white, and smooth plant (DDggHH) is crossed to a pure-breeding dwarf, purple, and rough plant (ddGGhh). The F1 progeny are then test crossed. What proportion of the offspring from the test cross will be tall, purple, and smooth? Enter your answer in the format 0.111 (include a zero before the decimal and three numbers after the decimal).
Read Details