In Drosophila, the allele red eyes (bw+) is dominant to the allele for brown eyes (bw). At another gene locus on the same chromosome, the allele for thin wing veins (hv+) is dominant to the allele for heavy wing veins (hv). Flies homozygous for bw and hv+ are crossed to flies homozygous for bw+ and hv to obtain doubly heterozygous F1 progeny.What would be the results of a test cross with the F1 flies?
A. 1 brown eye, heavy wing veins: 1 red eye, thin wing veins
B. 1 brown eye, heavy wing veins: 2 red eye, thin wing veins: 1 red eye, thin wing veins
C. 1 brown eye, thin wing veins: 2 red eye, thin wing veins: 1 red eye, heavy wing veins
D. 1 brown eye, thin wing veins: 1 red eye, heavy wing veins
Answer: D
You might also like to view...
As much as 50 percent of a soil’s volume is
a. air. b. iron. c. manganese. d. water.
Differentiate between primary, secondary, tertiary, and quaternary structure of proteins
What will be an ideal response?
Glucose is converted into glucose 6-phosphate by hexokinase. Glucose 6-phosphate then serves as the substrate for the enzyme phosphoglucose isomerase, which converts this reactant into fructose 6-phosphate. Fructose 6-phosphate serves as the substrate for phosphofructokinase, which converts fructose 6-phosphate into fructose 1,6-bisphosphate. Based on the information provided, this is an example of what?
A. Feedback inhibition B. A metabolic pathway C. Allosteric regulation D. Enzyme inhibition
The relationship between lactic acid and pyruvic acid is that
A. lactic acid is formed only in milk. B. lactic acid is formed from pyruvic acid in fermentation. C. one has phosphate and the other doesn't. D. one is twice as big (6 carbons) as the other (3 carbons).