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In pea plants, red flower color is dominant to white. Yellow seed color is dominant to green and inflated pods are dominant to constricted pods. Pollen is taken from a plant that is heterozygous for all three traits and used to fertilize flowers from a plant that is heterozygous for flower color, homozygous dominant for seed color and homozygous recessive pod shape. What are the predicted phenotypes and ratios for offspring from this mating? Show your work ( draw the punnet square)

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Lelia Lubowitz
Lelia LubowitzLv2
29 Sep 2019
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Related questions

In peas, the dominant seed shape is round and the recessive iswrinkled(w). The dominant trait for pod color is green andrecessive is yellow (y). A plant with round seeds and green podsthat i heterozygous only for the color trait is crossed with aplant that has wrinkled seeds and yellow pods, and the resulting F1progeny are selfed(self fertilized).
Write out the P1 genotpes and the F1 and F2 genotypic andphenotypic ratios.

What proportion of the plants with green pods and round seeds fromthe F2 generation would you expect to be true breeding(i.e. produceonly plants with green pods and round seeds)?

Flower position, stem length, and seed shape were three characters that Mendel studied. Each is controlled by an independently assorting gene and has dominant and recessive expression as follows:

Character Dominant Recessive

Flower Position Axial (A) Terminal (a)

Stem Length Tall (T) Dwarf (t)

Seed Shape Round (R) Wrinkled (r)

If a plant that is heterozygous for all three characteristics is allowed to self-fertilize, what proportion of the offspring would you expect to be as follows?

a. homozygous for the three dominant traits

b. homozygous for the three recessive traits

c. heterozygous for all three characters

d. homozygous for axial and tall, heterozygous for seed shape

A professor asks you to help perform a Mendel-type pea plant experiment. She wants to see how independent some of the traits that Mendel inspected really are. To get started, she tells you she did a test cross and shows you a greenhouse full of F1 pea plants. She asks you to continue her experiment while she has to attend a scientific meeting in Europe, and to cross the F1's to generate F2 offspring. You do this with the help of the professors graduate students and get 3044 plants (wow, you guys did a lot of work!). Mendel looked at seven pea plant traits (https://en.wikipedia.org/wiki/Gregor_Mendel): seed shape, flower color, seed coat tint, pod shape, unripe pod color, flower location, and plant height. If Mendelian inheritance were true, how many plants would you roughly expect to be phenotypically recessive in seed shape, pod shape and plant height, but genetically heterozygous in the other traits? Enter an integer number (round up).

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