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magentaduck721Lv1

28 Sep 2019

1. How many different gametes does a parent with the followinggenotype produce?

Aa bb Dd Ee

2. How many different genotypes are found among the progeny ofthe cross listed below?

aa bb Dd ee x Aa Bb Dd Ee

3. How many different phenotypes are found among the progeny ofthe cross listed below?

Aa Bb dd Ee x Aa Bb Dd Ee

4. What is the probability that the first offspring from thecross listed below will be heterozygous for all loci? (type as adecimal and round to 5 decimal places)

AA Bb Dd Ee x aa Bb Dd EE

5. What is the probability that the first offspring from thiscross:

AA Bb Dd ee x aa Bb Dd Ee

will be a son with the genotype:

Aa BB DD ee

Type your answer as a decimal and round to 6 decimal places.

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Related questions

Assume that there is complete dominance and complete penetrance at each locus and that epistasis does not occur. Write your answers in numeric form.

Referring to the cross DdFFGghhRrTt x DDffGgHhRRTt:

1. How many different gametes does the DdFFGghhRrTt parent produce? ___________

2. How many different genotypes are found among the progeny of this cross? __________

3. How many different phenotypes are found among the progeny of this cross? __________

4. What is the probability that the first offspring from this cross will show the dominant phenotype for all loci? (Type in as a decimal and round to 6 digits.) ________

5. What is the probability that the first offspring from this cross will be heterozygous for all loci? (Type in as a decimal and round to 6 decimal digits.) __________

6. What is the probability that the first offspring from this cross will be a son with genotype DDFfGghhRrTt? (Type in as a decimal and round to 6 decimal digits). __________

7. When a pea plant of genotype Aa Bb produces gametes whatproportion will be ab?

8. Hamsters are long haired if they have the genotype LL or Ll andthey are short haired if they have the genotype ll. A long hairedhamster is mated with a short haired hamster. Half of the offspringare long haired and half are short haired. This allows us toconclude that the long haired parent hamster is? D

9. In peas yellow seed (Y) is dominant over green seeds (y) andtall plant (T) is dominant over short plant (t) .Calculate theprobability of the genotypes and phenotypes. in the F2 generationof a dihybrid cross that begins when a dominant homozygote iscrossed with a recessive homozygote. You must show the all of theprobability calculations. D

10. In a fruit fly experiment, two gray-bodied fruit flies producemostly gray-bodied offspring, but some of the offspring have blackbodies. If there are 280 offspring, how many will you predict willhave grey bodies and how many will have black bodies? How many ofthe 280 offspring do you predict will be heterozygous? Show yourwork. D

11. In a dihybrid cross AaBb X AaBb what fraction of the offspringwould be D

i) homozygous for both recessive traits
ii) heterozygous for both traits
ii) homozygous for both traits

amaranthwasp103

Short answers please

1. What is the ultimate effect in an XY human with its SRY genemutated?

2. In humans, the allele for brown eye (B) is dominant to blue(b) eye color. If two heterozygous parents produce children, whatis the probability that:

a. The first child has brown eyes, and the next two childrenhave blue eyes?

b. If the couple above eventually produces a total of sixchildren, what is the probability that three of them will be boyswith brown eyes, and three of them girls with blue eyes?

3. In a paternity dispute, a type AB woman claimed that one ofthe four men was the father of her type A child. Which of thefollowing men could be the father of the child on the basis of theevidence below? Give your reasoning.

Man #1 = type A

Man #2 = type B

Man #3 = type O

Man #4 = type AB

4. Several mating were made among all-white cats. The progentfrom these mating showed the following phenotypic frequency:

All-white cats = 12/16

Black cats = 3/16

Gray cats = 1/16

a. Diagram the cross showing the genotypes of the parents, andtheir progeny as given above,

b. Which gene is epistatic? Explain your answer.

5. Mitosis and meiosis differ in that

a. homologues are seperated in prophase of mitosis

b. homologues are seperated in prophase I of meiosis

c. homologues are seperated in prophase II of meiosis

d. sister chromatids are seperated in prophase I of meiosis

6. The phases of meiosis that most resemble those of mitosisare

a. the meiosis I phase

b. the meiosis II phase

c. meiosis I, except for the pairing of homologues

d. meiosis II, except for the pairing of homologues

7. Genetic variability in sexually reproducing organism s arisesfrom

a. crossing over events between sister chromatids

b. crossing over events between nonsister chromatids

c. egg and sperm genetic recombination from distinctindividuals

d. egg and sperm recombination from an individual

8. A female contains an extra X chromosome, resulting fromnondisjunction. When this gamete is fertilized with normal sperm,it would result in an individual of a genotype

a. XXX

b. XXY

c. XYY

d. all of the above

e. only a and b

9. A diploid organism has the genotype AaBbCcDdEe. How manydifferent types of gametes can this individual produce?

a. 5

b. 10

c. 25

d. 32

e. 625

10. Assuming complete dominance, what is the phenotype ratio ofthe offspring of the cross AaBb x aabb?

a. 1:1

b. 3:1

c. 1:2:1

d. 1:1:1:1

e. 9:3:3:1

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