Question

3

Two plants are heterozygous for seed shape and have round seeds. If the two plants are crossed, what is the
probability that the offspring will have wrinkled seeds?
25 percent
50 percent
75 percent
100 percent
Mark this and return
Save and Exit
28:39
Next
Submit

Answer 1

When two heterozygous plants with round seeds are crossed, there is a 25 percent probability that the offspring will have wrinkled seeds.

Step-by-step explanation:

When two plants with round seeds are crossed, the offspring can have either round or wrinkled seeds. In this case, since both plants are heterozygous for seed shape, they have the genotype Rr, with 'R' representing the dominant allele for round seeds and 'r' representing the recessive allele for wrinkled seeds. When these two plants are crossed, the possible genotypes for the offspring are RR, Rr, and rr.

Since the wrinkled seed trait is recessive, it will only be expressed if the offspring inherits two copies of the 'r' allele. This means that the only way for the offspring to have wrinkled seeds is if they have the genotype rr.

The probability of inheriting the 'r' allele from both parents is 1/2 * 1/2 = 1/4. Therefore, the probability that the offspring will have wrinkled seeds is 25 percent.

Learn more about probability of seed shape inheritance