In radishes, two incompletely dominant genes control color and shape. Red and white radishes are
homozygous, whereas the hybrid is purple. Long and round are homozygous and, if crossed, will
produce an oval hybrid. Give the F2 genotypic and phenotypic ratio produced by crossing pure-breed
red long radishes with white round varieties. What will be an ideal response?
1 LL RR long red, 2 LL Rr long purple, 2 Ll RR oval red, 4 Ll RR oval purple, 1 ll RR round red, 1 ll Rr
round oval, 1 Ll rr long white, 2 Ll rr oval white, 1 ll rr round white
You might also like to view...
Which of the following skin changes is not associated with growing older?
A. There is less adipose tissue in the subcutaneous layer. B. The number of elastic fibers decreases. C. There are fewer sweat glands for sweating to occur. D. There is an increase in the number of oil glands. E. Pigmented blotches appear on the skin.
Gene therapy can best be described as the ____
a. repair of a defect (mutation) in a gene b. insertion of normal genes to act in place of mutant genes c. insertion of human genes into other organisms d. cloning of genes to produce and purify therapeutically useful proteins e. mapping of all human genetic information
Amniotic fluid is produced by ____ and then reabsorbed by ____.
A. Amnion then Maternal Tissue; Fetal Swallowing B. Amnion then Maternal Tissue; Placenta C. Placenta; Fetal Epidermis D. Placenta; Fetal Swallowing E. Placenta; Placenta
Why aren't ferns commonly found in deserts?
A. Fern spores are unable to resist prolonged dry conditions. B. Fern fronds are sensitive to UV light. C. Fern pollen is spread by insects that do not occur in deserts. D. Ferns are nonvascular and cannot absorb water from deep within the soil.