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.Given that these two gene loci are very closely linked, the phenotypic ratio in the F2 generation should be closest to
A. 3 red eye, thin wing veins: 1 brown eye, heavy wing veins
B. 1 brown eye: 1 red eye: 1 heavy wing veins: 1 thin wing veins
C. 1 brown eye, heavy wing veins: 2 red eye, thin wing veins: 1 brown eye, thin wing veins
D. 1 brown eye, thin wing veins: 2 red eye, thin wing veins: 1 red eye, heavy wing veins
Answer: D
You might also like to view...
The ____ gene is the only gene successfully targeted for breast cancer prevention
a. estrogen receptor b. BRCA1 c. estrogen diethylstilbestrol d. BRCA2 e. progestin receptor
Oral infections with herpes simplex virus 1 can lie dormant in nerve cells for years, and when a patient becomes stressed, the virus is released, forming cold sores on the lips. Where will the virus be while dormant in the nerve cell?
a. Floating in the nerve cell cytoplasm b. Integrated in the nerve cell chromosomes c. In the nerve cell membrane d. Floating outside of the nerve cell, waiting to reinfect it e. In the blood
Smooth muscle in the bladder contracts to send urine into the urethra.
Answer the following statement true (T) or false (F)
Heating glass in a furnace at temperatures above 600 degrees C is called _____.
What will be an ideal response?