In peas, seeds may be yellow (Y) or green (y). What proportion of the offspring
ID: 92257 • Letter: I
Question
In peas, seeds may be yellow (Y) or green (y). What proportion of the offspring in the following crosses would be expected to be yellow? a. YY times Yy b. Yy times Yy c. yy times yy In peas (again), the stem length may result in a tall (T) or dwarf plant. What proportion of the offspring in the following crosses would be expected to be tall, and what proportion dwarf? a. TT times tt b. TT times Tt c. Tt times Tt d. tt times Tt What proportion of the plants from the following crosses would be tall with yellow, wrinkled seeds? a. TtYYRr times tt YYrr b. TTYyRr times TtYyRr c. ttYyrr times ttyyRr d. TtYyRr times TtYyRrExplanation / Answer
7. In peas, seeds may be yellow (Y) or green (y) what proportion of offspring in the following crosses would be expected to be yellow?
In the above example the Y is dominant allele and y is a recessive allele. The dominant allele express themselves but recessive alleles cannot.
a. In the cross YYxYy will give 2 yellow color seeds.
b. In the cross YyxYy will give 3:1 proportion out of which the yellow color seeds are 3.
c. In cross yyxyy the seed color is green and no yellow color seeds are formed.