Question

What would happen to the probabilities of yellow and green seeds if one parent were homozygous recessive and the other were homozygous dominant?

Answer 1

Explanation:

He proved that an organism inherits alleles ("factors") that control which traits are expressed and that these alleles could be dominant or recessive.

Answer 2

You might show the parent plants' genotype Yy, and the expected offspring's genotypes would be 25% YY, 50% YY, and 25% YY. A heterozygous yellow-seeded plant hybrid will produce yellow seeds in 75% of its offspring if yellow is the dominant colour, and in 25% of its offspring if green is the dominant colour.

• The allele for yellow seeds should be written in upper case, but the allele for green seeds should be put in lower case, as yellow seeds are dominant to green.
• Assume that Y is the allele for yellow seeds and y is the allele for green seeds.
• The genotype of the heterozygous yellow-seeded plant will thus be "Yy," whereas the genotype of the green-seeded plant will be "yy" (as the recessive allele is expressed only in homozygous conditions).
• Half of the offspring from a heterozygous yellow-seeded and green-seeded plant hybrid will be yellow and half will be green.
• Consequently, option A is the right response.
• You might display the genotype Yy of the parent plants, and the genotypes of the anticipated progeny would be 25% YY, 50% YY, and 25% yy.
• If yellow is the predominate colour, then 75% of the progeny would produce yellow seeds and 25% would produce green seeds.
• These genotype A would result in 75% of progeny with green seeds and 25% with yellow seeds if green is the prevailing hue.

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