The seeds in bush bean pods are each the product of anindependent fertilization event. Green seed color is dominant towhite seed color in bush beans. If a heterozygous plant with greenseeds self-fertilizes, what is the probabilitythat 6 seeds in a single pod of the progeny plant will consistof:

A) 4 green and 2 white seeds?

B) all white seeds?

C) at least 5 white seeds?

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Lelia LubowitzLv2

28 Sep 2019

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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)

emeraldminnow377

1.
In wolves, black coat color is recessive to the normal grey, andblue eye color is recessive to brown. A black-coated blue eyed malemates with a female who is heterozygous for both traits, and thereare 8 pups in the litter.
What are the expected genotoypes of the pups? what are the expectedphenotypes?

2.
A man and a woman both have normal color vision, and both havecolorblind fathers.
What proportion of their daughters would you expect to be colorblind?
What proportion of their sons?

3.
Assume that in the U.S. in 1960, the frequency of the autosomalrecessive Tay-Sachs disease among eastern European Jews was 1 per3600births.
What was the frequency of the Tay-Sachs allel in thispopulation?
In 1961, a woman of polish ancestry whose brother died of Tay-Sachsdisease marries a Jewish man of Hungarian ancestry. Assuming thatshe is a carrier, what is the probability that their first childwill have Tay-Sachs disease?

4. In fruit flies, black body (b) is recessive to normal body color(B). In a breeding study, a population of flies is allowed to mateat random. In the population, 3000 flies are homozygous for blackbody color, and 2000 flies are homozygous for the normalallele.
What is the frequency of each genotype in the F1 generation?
What would the proportion of phenotpyes be?
What is the frequency of the two alleles, B and b, in the F1generation?

5.
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)?

Thank you

A heterozygous pea plant that is tall with yellow seeds, TtYy, isallowed to self-fertilize. Gametes produced?
Cross over is the physical exchange of chromosome pieces. Crossover occurs during which of the following events?

A. Mitosis
B. Meiosis I
C. Meiosis II
D. Both Mitosis and Meiosis I
E. Both Mitosis and Meiosis II

Which of the following statement about double fertilization iscorrect?

A. It occurs in higher plants
B. In double fertilization, one sperm fertilizes the egg, a secondsperm unites with polar cell to produce the endosperm
C. Double fertilization ensures that the endosperm (which uses alarge amount of plant resources) will develop only when an egg cellhas been fertilized
D. all of the above statement is correct
E. All the above statement is incorrect

A true breeding line of green pod pea plants is crossed with atrue-breeding line of yellow pod plants. All of their offspringhave green pods. From this information it can be stated that thegreen color is _____ to the yellow color.
recessive
dominant
subservient
Blended

In a dihybrid cross using Mendelian inheritance, if both parentsare heterozygous for both traits, what will be the phenotypic ratioof their offspring?
3 : 1
1 : 2 : 1
1 : 1
9 : 3 : 3 : 1

The genetic composition of an individual is called its_____________.
phenotype
Genotype

The sex of fruit fly with two XX chromosome and four sets ofautosome will be
Male
Female

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