Question

In a particular plot, 22 healthy plants resulted in a residual of 2.684. How many seeds were planted in that plot?

a) 44
b) 66
c) 88
d) 110

Answer 1

In Mendelian genetics, the F2 progeny of a cross between true-breeding round and wrinkled seed pea plants would be expected to exhibit a 3:1 ratio of round to wrinkled seeds, with option (c) 405:395 round seeds:wrinkled seeds being closest to this expectation.

Step-by-step explanation:

The student's question pertains to Mendelian genetics, specifically the predicted outcomes of crossing pea plants with different seed textures. When a true-breeding round seed plant is crossed with a true-breeding wrinkled seed plant, the F1 offspring are uniformly round because round is the dominant trait. However, the F1 plants are heterozygous for the seed texture trait. When these F1 plants are crossed to produce F2 progeny, the expected ratio according to Mendel's principles is a 3:1 ratio of round to wrinkled seeds, assuming that seed texture follows simple Mendelian inheritance.

Using this 3:1 ratio, if we presume that we have a large enough sample like 800, we would expect about 600 round seeds (3/4) and about 200 wrinkled seeds (1/4). Therefore, the alternative closest to our expectation in the F2 progeny is c. 405:395 round seeds:wrinkled seeds.