Homework Answers
7. The R allele codes for round seeds while r allele codes for wrinkled seeds. Y allele codes for yellow seed color, while y codes for green seed color. As the cross is for two different genes, it is a dihybrid cross. R and Y are dominant alleles while r and y are recessive alleles.
|
YyRr |
|||||
|
YR |
Yr |
yR |
yr |
||
|
yyrr |
yr |
YyRr Yellow round |
Yyrr Yellow wrinkled |
yyRr Green round |
yyrr green wrinkled |
|
yr |
YyRr Yellow round |
Yyrr Yellow wrinkled |
yyRr Green round |
yyrr Green Wrinkled |
|
|
yr |
YyRr Yellow round |
Yyrr Yellow wrinkled |
yyRr Green round |
yyrr Green Wrinkled |
|
|
yr |
YyRr Yellow round |
Yyrr Yellow wrinkled |
yyRr Green round |
yyrr Green Wrinkled |
a. Yellow round seeds with genotype YyRr: 4 out of 16
right choice= 4
b. Yellow wrinkled seeds with genotype Yyrr: 4 out of 16
right choice= 4
c. Green round seeds with genotype yyRr: 4 out of 16
right choice= 4
d. Green wrinkled seeds with genotype yyrr: 4 out of 16
right choice= 4
8. The R allele codes for round seeds while r allele codes for wrinkled seeds. Y allele codes for yellow seed color, while y codes for green seed color. As the cross is for two different genes, it is a dihybrid cross. R and Y are dominant alleles while r and y are recessive alleles.
|
YyRr |
|||||
|
YR |
Yr |
yR |
yr |
||
|
YyRr |
YR |
YYRR Yellow round |
YYRr Yellow round |
YyRR Yellow round |
YyRr Yellow round |
|
Yr |
YYRr Yellow round |
YYrr Yellow wrinkled |
YyRr Yellow round |
Yyrr Yellow wrinkled |
|
|
yR |
YyRR Yellow round |
YyRr Yellow round |
yyRR green round |
yyRr green round |
|
|
yr |
YyRr Yellow round |
Yyrr Yellow wrinkled |
yyRr green round |
Yyrr Green wrinkled |
a. Yellow round seeds= 9 out of 16
Right answer= 9
b. Yellow wrinkled seeds= 3 out of 16.
Right Choice= 3
c. Green round seeds= 3 out of 16
Right Choice=3
d. Green wrinkled seeds= 1 out of 16.
Right Choice=1
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Part A - Deducing phenotypes and genotypes of selfed parents
Mendel studied pea plants dihybrid for seed shape (round versus
wrinkled) and seed color (yellow versus green). Recall that
the round allele (R) is dominant to the wrinkled allele
(r) and
the yellow allele (Y) is dominant to the green allele
(y).
The table below shows the F1 progeny that result from
selfing four different parent pea plants.
Use the phenotypes of the F1 progeny to deduce the
genotype and...
Deducting phenotypes and genotypes of selfed parents Mendel studied pea plants dihybrid for seed shape (round...
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8) You plant some of Johnny and Jenny's offspring. Two in particular become your favorite plants...
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Complete the following dihybrid cross and answer the questions that follow In peas, the allele for...
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1. A pea plant with round seeds is crossed with a pea plant that has wrinkled seeds. For the cross, indicate each of the following: a) the genotype of each of the parents if the dominant phenotype is heterozygous. b) What gametes will each parent produce c) if two round plants from the Fl generation are crossed, what would be the resulting genotypes and phenotypes of the F2 generation? Provide the Punnett square as well as your answer below.
(More Genetics Problems and Difficult Genetics Problems). MORE GENETICS PROBLEMS 1. When tall plants mate with dwarf plants, only tall plants occur in the offspring. Assign symbols and show the phenotypes and genotypes in the parental (P) and first filial generations for a cross between tall plants and dwarf plants that produces only tall plants. 2. Show the expected outcome when the F1 plants in problem #1 are crossed. Be sure to give both phenotype and genotype ratios for these...
Part A - Deducing phenotypes and genotypes of selfed parents
Mendel studied pea plants dihybrid for seed shape (round versus
wrinkled) and seed color (yellow versus green). Recall that
the round allele (R) is dominant to the wrinkled allele
(r) and
the yellow allele (Y) is dominant to the green allele
(y).
The table below shows the F1 progeny that result from
selfing four different parent pea plants.
Use the phenotypes of the F1 progeny to deduce the
genotype and...
Deducting phenotypes and genotypes of selfed parents Mendel studied pea plants dihybrid for seed shape (round versus wrinkled) and seed color (yellow versus green). Recall that the round allele (R) is dominant to the wrinkled allele (r) and the yellow allele (Y) is dominant to the green allele (y). The table below shows the F1 progeny that result from selfing four different parent pea plants. Use the phenotypes of the F1 progeny to deduce the genotype and phenotype of each...
8) You plant some of Johnny and Jenny's offspring. Two in particular become your favorite plants and you name them Jamie and Josie. You decide to cross these two plants together (you can cross siblings in plants, but this is not really something that occurs very often in humans for various reasons!). Place the gametes that would result from meiosis in Jamie and Josie in the top row for Jamie and left column for Josie of the Punnett square. Then...
Complete the following dihybrid cross and answer the questions that follow In peas, the allele for round seeds (R) is dominant to that for wrinkled seeds (T); the allele for yellow seeds (Y) is dominant to that for green seeds (y). Cross a plant that has yellow round seeds (YyRr) with one that has green wrinkled seeds ( yrr) 17. What percentage of the offspring will have a green phenotype? 18. What percentage of the offspring will have wrinkled seeds?...
Table 1: Mendel's Traits and Symbols for Pea Plants Traits Symbol Symbol Dominant Allele Round Yellow Smooth Green Tall Axial Seed Shape Seed Color Pod Shape Pod Color Plant Height Flower Position S Recessive Allele Wrinkled Green Constricted Yellow Short Terminal а Refer back to Table 1 on the first pa abie 1 on the first page of this assignment to answer the following two questions. Use the appropriate symbols and phenotypes in your answer, 1. Show the genotypes of...
Unit C: Assignment 6D Module 6: Mendelian Genetics and Inheritance 2 3. Write a summary sentence explaining the result of each test cross. 4. Pea Plants In pea plants, a round seed shape (R) is dominant over a wrinkled seed shape (). A round-seeded pea plant was crossed with another round-seeded pea plant. What are the genotype(s) and phenotype(s) ratios of the F1 generation? Show all possibilities using Punnett squares. State the F1 generation genotypes and phenotypes. (3 marks -...
Part B - Deducing genotypes of crossed parents A plant grown from a [round, yellow] seed is crossed with a plant grown from a [wrinkled, yellow] seed. This cross produces four progeny types in the F [round, yellow], [wrinkled, yellow], [round, green], and [wrinkled, green]. Use this information to deduce the genotypes of the parent plants. Indicate the genotypes by dragging the correct label to the appropriate location.
1. A pea plant with round seeds is crossed with a pea plant that has wrinkled seeds. For the cross, indicate each of the following: a) the genotype of each of the parents if the dominant phenotype is heterozygous. b) What gametes will each parent produce c) if two round plants from the Fl generation are crossed, what would be the resulting genotypes and phenotypes of the F2 generation? Provide the Punnett square as well as your answer below.
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