Another trait in pea plants that follows a simple inheritance pattern is flower colour. Purple flowers are a dominant trait while white flowers are a recessive trait.Explain what this difference means in terms of the alleles for flower colour.
Question
Another trait in pea plants that follows a simple inheritance pattern is flower colour. Purple flowers are a dominant trait while white flowers are a recessive trait.Explain what this difference means in terms of the alleles for flower colour.
Solution
In terms of alleles for flower color in pea plants, the difference between dominant and recessive traits can be explained as follows:
-
Alleles are different forms of a gene that are found at the same place on a chromosome. In this case, the gene is for flower color, and the alleles are purple and white.
-
Each pea plant has two alleles for each trait, one from each parent. The combination of these two alleles determines the trait that the plant will express.
-
If a pea plant has at least one dominant allele (in this case, purple), it will express the dominant trait. This is because the dominant allele masks the effect of the recessive allele. So, a plant with a 'Purple-White' or 'Purple-Purple' allele combination will have purple flowers.
-
On the other hand, a plant will only express the recessive trait (in this case, white) if it has two copies of the recessive allele. So, a plant with a 'White-White' allele combination will have white flowers.
-
This is why purple flowers are more common than white flowers in pea plants. Even though the alleles for purple and white are equally likely to be passed on from parent to offspring, the presence of a single purple allele is enough to result in purple flowers.
Similar Questions
Mendel bred a purple-flowered pea plant with a white-flowered pea plant and found that all the offspring had purple flowers. But then when he bred together two of the purple-flowered offspring, some of their offspring had white flowers.Using the concepts of dominant and recessive alleles, explain how the trait of white flowers skipped a generation.
In peas, purple flower colour is determined by the dominant P allele and white flower colour is determined by the recessive p allele. If purple-flowered PP plants are crossed with white-flowered pp plants, the phenotype of the F1 progeny will be:Question 4Select one:a.white-floweredb.purple-floweredc.¾ purple-flowered : ¼ white floweredd.¼ purple-flowered : ¾ white flowered
In the garden peas of one pair of alleles controls the height of theplant and a second pair of alleles controls flower colour. Theallele for tall (T) is dominant to the allele for dwarf (t) and theallele for purple flower colour (P) is dominant to the allele forwhite (p).a. A tall plant with purple flowers crossed with a dwarf plant withwhite flowers produced 50% tall, purple and 50% tall, whiteprogeny. What is the genotype of the parents?b. A tall plant with white flowers crossed with a dwarf plant withpurple flowers produced 25% tall purple, 25% tall white, 25%dwarf purple and 25% dwarf white individuals. What is thegenotype of the parents?
The flower color characteristic in a plant is determined by red and white alleles. If the only two possible phenotypes are red or white, which term describes this pattern of inheritance?Group of answer choicespolygeniccomplete dominanceincomplete dominanceco-dominance
Which one of the following traits of garden pea studied by Mendel was a recessive feature?Green seed colourGreen pod colourRound seed shapeAxial flower position
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.