Homework Answers
Answer:
Since in the given ratio, long eared pigs, short eared pigs and medium eared pigs are mentioned , we can take the character of medium eared as one of the characters which is expressed in a heterozygous condition.
The ratio mentioned in the question is 7:4:3 i.e. 7 medium eared (parental),4 long eared and 3 short eared. It is equal to 50% medium eared ,28.57% long eared and 21.42% are short eared. The approximate ratio is 2.3:1.3:1
Two medium eared pigs are mated, let the genotypes of pigs be Ll
Then the cross would be
|
gamates |
L |
l |
|
L |
LL Long ear |
Ll Medium ear |
|
l |
Ll Medium ear |
ll Short ear |
The phenotypic ratio obtained here is 2:1:1 i.e. two medium ear, one long ear and one short ear. The genotypic ratio is 2:1:1 i.e. Ll(2):LL(1):ll(1)
The ratio is approximately equal to the ratio obtained in the experiment.
If there was complete dominance then we would have got the typical Mendelian ratio of 3:1 for the phenotypes.
The ratio obtained shows that the two alleles involved are incompletely dominant and hence when both the alleles (Ll) are present, the character expressed is the intermediate i.e. the medium ear.
If both the alleles are for long ear(LL) then the expressed character is of long ear.
And if both the allels are for short ear(ll) then the expressed character is of short ear.
But in the heterozygous condition(Ll) both the alleles show incomplete dominance and both the characters are expressed partially resulting in medium ear length.
Add Answer to:
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Background Information for Question 1: . Question 1 A) What is the inheritance pattern of eye...
Background Information for Question 1:
.
Question 1 A)
What is the inheritance pattern of eye colour? Explain your
answer.
Multiple choice, Select one:
a. Red is incomplete dominance to yellow and the heterozygotes
have orange eyes.
b. Red is dominant to orange and yellow. Orange is recessive to
red but dominant to yellow. Yellow is recessive to both red and
orange.
c. We need more information to answer the question.
d. Red is dominant to yellow.
e. Red is...
Background Information for Question 1: . Question 1 A) What is the inheritance pattern of eye...
Background Information for Question 1:
.
Question 1 A)
What is the inheritance pattern of eye colour? Explain your
answer.
Multiple choice, Select one:
a. Red is incomplete dominance to yellow and the heterozygotes
have orange eyes.
b. Red is dominant to orange and yellow. Orange is recessive to
red but dominant to yellow. Yellow is recessive to both red and
orange.
c. We need more information to answer the question.
d. Red is dominant to yellow.
e. Red is...
Background Information for Question 1: . Question 1 A) What is the inheritance pattern of eye...
Background Information for Question 1:
.
Question 1 A)
What is the inheritance pattern of eye colour? Explain your
answer.
Multiple choice, Select one:
a. Red is incomplete dominance to yellow and the heterozygotes
have orange eyes.
b. Red is dominant to orange and yellow. Orange is recessive to
red but dominant to yellow. Yellow is recessive to both red and
orange.
c. We need more information to answer the question.
d. Red is dominant to yellow.
e. Red is...
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3. In pigs, black hair (B) is dominant to red hair (b). Erect ears (E) are dominant to drooping ears (e). What are the expected proportions of the different phenotypes resulting from a mating between two pigs heterozygous for both traits? SHOW A PUNNETT SQUARE 4. There are 2 colors in color squash, white & yellow. White (W) is dominant over yellow (w). What are the expected genotype and phenotype frequencies for each of the...
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Match the mode of inheritance with an example. 1. Codominance 2. Overdominance 3. Epistasis 4. Pleiotropy 5. Incomplete Dominance Four O'clock flower color (Click to select) (Click to select) (Click to select) (Click to select) AB blood Cystic fibrosis Four O'clock flower color 9:7 phenotype dihybrid ratio sickle cell anemia
7) You cross individuals with genotypes as given below. The seven genes have a typical Mendelian pattern of inheritance, and each gene has two alleles that have a complete dominance relationship: AaBbCcddEeFFgg X aabbCcDdEeFfGg A) What is the probability that one offspring from this mating will have the genotype AaBbccDdeeFFGg (4 pts.)? B) What is the probability that one offspring from this mating will express the dominant phenotype for all seven genes (4 pts.)?
7. Tra diploid organism has the genotype AABh, what% of its gametes would you expect to have the genotype A (assume that A/a locus and B/blocus are found on different chromosomes)? a) 1598 b) 2596 c) 5096 d) 7546 8. Phenylketonuria is an inherited human genetic disorder resulting from a mutation to the PAH gene. Individuals with mutant forms of the PAW gene exhibit leaming deficits, abnormal skin pigmentation, as well as heart problems. This is an example of: a)...
PPPPPP Step 5: Determine the phenotype of cach possible allele combination shown in the offspring. In this instance, three of the offspring Chose with the genotypes EE, Ee, and Be) have free earlobes, because the free earlobe allele is dominant to the attached-carlobe allele. One offspring, ec, has attached earlobes. Therefore, the proba- bility of having offspring with free earlobes is 3/4 and with attached earlobes is 1/4. Additional Single-Factor Inheritance Problems (One Trait Followed from One Generation to the...
Background Information for Question 1:
.
Question 1 A)
What is the inheritance pattern of eye colour? Explain your
answer.
Multiple choice, Select one:
a. Red is incomplete dominance to yellow and the heterozygotes
have orange eyes.
b. Red is dominant to orange and yellow. Orange is recessive to
red but dominant to yellow. Yellow is recessive to both red and
orange.
c. We need more information to answer the question.
d. Red is dominant to yellow.
e. Red is...
Background Information for Question 1:
.
Question 1 A)
What is the inheritance pattern of eye colour? Explain your
answer.
Multiple choice, Select one:
a. Red is incomplete dominance to yellow and the heterozygotes
have orange eyes.
b. Red is dominant to orange and yellow. Orange is recessive to
red but dominant to yellow. Yellow is recessive to both red and
orange.
c. We need more information to answer the question.
d. Red is dominant to yellow.
e. Red is...
Background Information for Question 1:
.
Question 1 A)
What is the inheritance pattern of eye colour? Explain your
answer.
Multiple choice, Select one:
a. Red is incomplete dominance to yellow and the heterozygotes
have orange eyes.
b. Red is dominant to orange and yellow. Orange is recessive to
red but dominant to yellow. Yellow is recessive to both red and
orange.
c. We need more information to answer the question.
d. Red is dominant to yellow.
e. Red is...
Circle the correct answer, there may be more than one correct answer 1. Diploid Organisms: a) typically have 23 pairs of chromosomes b) are heterozygous for a trait when they carry different alleles c) carry 2 copies of chromosomes d) are homozygous for a trait when they carry different alleles 2. Why are garden peas a good subject for Mendel's experiments? a) garden peas had either or traits b) garden pess could self-pollinate to produce offspring of the same variety...
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