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isaiahh223gLv4
5 Mar 2022
5:I provided all the info please make sure your work is correct and not copied off of google
Predict the Genes
Overview:
In this assignment you will review Punnett squares and their use in predicting the genetic makeup of offspring. Then you will be given three different scenarios and use Punnett squares to predict the likelihood of the genotypes and phenotypes of the offspring.
Background Information:
Probability is the likelihood that an event will occur. Geneticists use Punnett squares to determine the probability that each potential genotype will occur in a genetic cross. A specific genetic trait has both a genotype and a phenotype. The genotype represents the genes that are present for a specific trait. The phenotype is the physical representation of that trait.
The genotype of specific traits represents both dominant and recessive alleles. An allele is a form of a specific gene found at the same point on a strand of DNA. A dominant allele is represented as a capital letter and a recessive allele is represented by a lowercase letter. A dominant trait means that it will mask or cover a recessive trait. An organism's genetic traits contain two alleles because one is inherited from each parent. If an organism has two of the same alleles, then their genotype is called homozygous. A trait with two dominant alleles would be called homozygous dominant. Two recessive alleles would be called homozygous recessive. If an organism has two different alleles, their genotype is called heterozygous, which means one allele is dominant and one allele is recessive.
There are cases where heterozygous alleles don't completely mask one another. Incomplete dominance is where a mixture of the trait for each allele is present in the phenotype. Codominance is where both alleles are present in the phenotype.
A Punnett square is a cross between two parents, but it may include multiple alleles and traits. A cross can be done for one trait where each parent contributes two alleles. A double cross can be done with two traits where each parent contributes 2 alleles per trait making 4 alleles total per parent. Crosses can be done with any number of traits, but only between two parents.
Assignment:
In this assignment you will be given multiple scenarios and asked to predict the potential genes inherited by an offspring. In each scenario, you will create a Punnett square to cross the parent generation and predict the likelihood of both the genotypes and phenotypes of the offspring.
Submission:
Your submission will be an image or typed response with the answers to the questions for each scenario.
Scenario 1:
There is a population of rabbits with either brown or white fur. Brown fur is dominant to white fur. Use B for dominant and b for recessive. One parent is heterozygous and one parent is homozygous dominant.
1. What are the genotypes and phenotypes of each parent?
2. What percentage of the offspring will be homozygous dominant?
3. What percentage of the offspring will be homozygous recessive?
4. What percentage of the offspring will have brown fur?
Scenario 2:
In a group of pea plants, some have round seeds and some have wrinkled seeds. Round is dominant and wrinkled is recessive. W is for the dominant and w is for recessive. The parents are heterozygous and homozygous recessive.
1. What is the phenotype of each parent?
2. Create a Punnett square crossing the two parents and record your results as percentages.
WW_______Ww_______ww_______
3. What percentage of the offspring will be wrinkled? Round?
Wrinkled_______ Round_______
Scenario 3:
In a population of fish, there are multiple colors possible. The alleles in this group are case of incomplete dominance. This means that the dominant allele doesn't completely mask the recessive, and the phenotype can be a mixture of both. The dominant allele is colored red (Y), and the recessive allele is colored yellow (y).
1. In a cross between a fish with the alleles Yy and a fish with yy,
a. What would the genotype(s) be of the offspring?
b. What would the phenotype(s) be?
2. In a cross between a homozygous dominant fish and a heterozygous fish,
a. What would the genotype(s) be as percentages?
b. What would the phenotype(s) be as percentages?
3. For all of the offspring to be heterozygous and orange in color, what would the alleles of the parents have to be?
5:I provided all the info please make sure your work is correct and not copied off of google
Predict the Genes
Overview:
In this assignment you will review Punnett squares and their use in predicting the genetic makeup of offspring. Then you will be given three different scenarios and use Punnett squares to predict the likelihood of the genotypes and phenotypes of the offspring.
Background Information:
Probability is the likelihood that an event will occur. Geneticists use Punnett squares to determine the probability that each potential genotype will occur in a genetic cross. A specific genetic trait has both a genotype and a phenotype. The genotype represents the genes that are present for a specific trait. The phenotype is the physical representation of that trait.
The genotype of specific traits represents both dominant and recessive alleles. An allele is a form of a specific gene found at the same point on a strand of DNA. A dominant allele is represented as a capital letter and a recessive allele is represented by a lowercase letter. A dominant trait means that it will mask or cover a recessive trait. An organism's genetic traits contain two alleles because one is inherited from each parent. If an organism has two of the same alleles, then their genotype is called homozygous. A trait with two dominant alleles would be called homozygous dominant. Two recessive alleles would be called homozygous recessive. If an organism has two different alleles, their genotype is called heterozygous, which means one allele is dominant and one allele is recessive.
There are cases where heterozygous alleles don't completely mask one another. Incomplete dominance is where a mixture of the trait for each allele is present in the phenotype. Codominance is where both alleles are present in the phenotype.
A Punnett square is a cross between two parents, but it may include multiple alleles and traits. A cross can be done for one trait where each parent contributes two alleles. A double cross can be done with two traits where each parent contributes 2 alleles per trait making 4 alleles total per parent. Crosses can be done with any number of traits, but only between two parents.
Assignment:
In this assignment you will be given multiple scenarios and asked to predict the potential genes inherited by an offspring. In each scenario, you will create a Punnett square to cross the parent generation and predict the likelihood of both the genotypes and phenotypes of the offspring.
Submission:
Your submission will be an image or typed response with the answers to the questions for each scenario.
Scenario 1:
There is a population of rabbits with either brown or white fur. Brown fur is dominant to white fur. Use B for dominant and b for recessive. One parent is heterozygous and one parent is homozygous dominant.
1. What are the genotypes and phenotypes of each parent?
2. What percentage of the offspring will be homozygous dominant?
3. What percentage of the offspring will be homozygous recessive?
4. What percentage of the offspring will have brown fur?
Scenario 2:
In a group of pea plants, some have round seeds and some have wrinkled seeds. Round is dominant and wrinkled is recessive. W is for the dominant and w is for recessive. The parents are heterozygous and homozygous recessive.
1. What is the phenotype of each parent?
2. Create a Punnett square crossing the two parents and record your results as percentages.
WW_______Ww_______ww_______
3. What percentage of the offspring will be wrinkled? Round?
Wrinkled_______ Round_______
Scenario 3:
In a population of fish, there are multiple colors possible. The alleles in this group are case of incomplete dominance. This means that the dominant allele doesn't completely mask the recessive, and the phenotype can be a mixture of both. The dominant allele is colored red (Y), and the recessive allele is colored yellow (y).
1. In a cross between a fish with the alleles Yy and a fish with yy,
a. What would the genotype(s) be of the offspring?
b. What would the phenotype(s) be?
2. In a cross between a homozygous dominant fish and a heterozygous fish,
a. What would the genotype(s) be as percentages?
b. What would the phenotype(s) be as percentages?
3. For all of the offspring to be heterozygous and orange in color, what would the alleles of the parents have to be?
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snehabhandari43Lv10
5 Mar 2022
