When a true-breeding pea plant that has yellow seeds is pollinated by a plant that has green seeds, then all the F1 plants have yellow seeds. This means that the allele for yellow is:
Correct answer: C. Dominant
- A. Heterozygous
- B. Recessive
- C. Dominant
- D. Lethal
Explanation
A yellow color is expressed in all F1 offsprings as it masks the effect of green (which then must be recessive) it is a dominant allele, and because all offsprings have yellow it indicates a homozygous dominant combination in the yellow plant.
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Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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