Answer:
- The plants with yellow pods do not have an allele for green pods.
- The plants with green pods might be homozygous or heterozygous for pod color.
Step-by-step explanation:
Gregor Mendel's law (principle) of dominance states that some alleles are dominant, whereas others are recessive. An organism with a dominant allele for a particular trait will always have that trait expressed, or seen, in the organism. An organism with a recessive allele for a particular trait will only have that trait expressed when the dominant allele is not present.
The question states that Jose's pea plants can have two forms of the pod color allele—a dominant green allele and a recessive yellow allele.
His plants with yellow pods must be homozygous for the recessive yellow allele. Therefore, the plants with yellow pods cannot have an allele for green pods.
His plants with green pods could have two alleles for green pods or one allele for green pods and one for yellow pods. Mendel's law of dominance states that an organism needs only one copy of the dominant allele for its trait to be expressed. So, the plants with green pods might be homozygous or heterozygous for pod color.
Incomplete dominance is a condition in which one allele is not completely dominant over another, resulting in a phenotype (outward appearance) somewhere between the two homozygous forms. Since it is known that green pods are dominant to yellow pods and no other pod colors were produced in Jose's garden, it can be concluded that the plants are not displaying incomplete dominance.