Flower position, stem length, and seed shape are three characters that Mendel studied. Each is controlled by an independently assorting gene and has dominant and recessive expression as indicated in Table 14.1.

If a plant that is heterozygous for all three characters is allowed to self-fertilize, what proportion of the offspring would you expect to be each of the following? (Note: Use the rules of probability instead of a huge Punnett square.)
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

Question

Flower position, stem length, and seed shape are three characters that Mendel studied. Each is controlled by an independently assorting gene and has dominant and recessive expression as indicated in Table 14.1.

Table showing dominant and recessive traits in pea plants with F2 generation ratios for flower color, seed color, and more.

If a plant that is heterozygous for all three characters is allowed to self-fertilize, what proportion of the offspring would you expect to be each of the following? (Note: Use the rules of probability instead of a huge Punnett square.)

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

Accepted Answer

Hello everyone here we have a question telling us to assume that the homos I guess dominant trait of a flower is red and long stemmed and the homos I guess recessive trait is white and short stemmed. Considering that these traits are controlled by independently a sorting genes. What is the probability of producing a hetero Xigris red flower and hetero Xigris long stemmed flower from Hetero sickos parents. So we have hetero Ziegenfuss red. So we're going to say capital R. Lowercase R. Capital R. Lowercase R. And we're going to do our punnett square for that. We get capital R. Capital R. Capital R. Lowercase R. Capital R. Lowercase R. Lowercase R. Lowercase R. And then we have long stemmed. So we're going to use capital L. Lowercase L. Capital L. Lowercase L. So we get capital L. Capital L. Capital L. Lowercase L. Capital L. Lowercase L. Lower case L. Lower case L. And the question is what is the probability of producing a Hetero sickos red flower and hetero sickness long stemmed flower from our hetero sickos parents. So are hetero six. Red is one half its capital R. Little R. And our hetero zegas long stemmed is capital L. Lowercase L. So that's also one half. So one half times one half equals 1/4. So our answer is a 1/4. Thank you for watching bye

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Key Concepts

Mendelian Genetics

Independent Assortment

Probability in Genetics