Briefly describe what an allele is, then discuss the differences between dominant and recessive alleles. Provide...
Briefly describe what an allele is, then discuss the differences
between dominant and recessive alleles. Provide an example of each
type of allele in your discussion.
Your response must be a minimum of 75 words.
Homework Answers
An allele is a variant form of a gene, present at the same genetic position or locus, in the chromosome. Diploid organisms inherit one allele from each parent.
Diploid organisms like humans possess two alleles of a gene. If both the alleles are dominant ones, or if, one is a dominant allele and another is a recessive one, the organism will be referred to as homozygous dominant and heterozygous respectively. In both the cases, the organism will express the phenotype of the dominant allele. On the other hand, if both the alleles are recessive, the organism will express the phenotype of the recessive allele.
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Briefly describe what an allele is, then discuss the differences
between dominant and recessive alleles. Provide...
If selection favours the dominant allele and mutation is creating recessive alleles at a rate of...
If selection favours the dominant allele and mutation is creating recessive alleles at a rate of 0.006 per generation in balance with the rate at which selection is eliminating them, if the frequency of the recessive allele is 0.03 what is the rate of selection in this balanced state (round to the nearest 0.001)?
1) What is the molecular basis of dominant and recessive alleles (for complete dominance; ignore incomplete...
1) What is the molecular basis of dominant and recessive alleles (for complete dominance; ignore incomplete dominance, epistasis, etc.)? To answer this question, consider the following: a) If alleles are copies of the same gene, why are two types of alleles? What differentiates a dominant allele from a recessive allele (at the molecular level)? Be specific (base pairs, transcription/translation method, protein produced, etc.) b) Why is the phenotype determined by the dominant allele in heterozygous genotype? Be specific. c) What...
Match the following terms with the appropriate description below: a. alleles b. autosomes c. dominant allele...
Match the following terms with the appropriate description
below:
a. alleles b. autosomes c. dominant allele d. genotype e.
heterozygous f. homozygote g. phenotype h. recessive allele i. sex
chromosomes
1. ________________ genetic make-up
2. ________________ how genetic make-up is expressed
3. ________________ chromosomes that dictate most body
characteristics
4. ________________ alternative forms of the same gene
5. ___________an individual bearing two alleles that are the same
for a particular trait 6. ________________ an allele that is
expressed, whether in...
A certain disease is caused by a recessive mutant allele. (The wild-type allele is dominant.) However,...
A certain disease is caused by a recessive mutant allele. (The wild-type allele is dominant.) However, the penetrance of the disease is 75%. Two individuals known to be heterozygotes have a child. What is the probability that the child exhibits the disease?
Describe dominant–recessive inheritance. Provide at least three examples each of dominant and recessive characteristics.
Describe dominant–recessive inheritance. Provide at least three examples each of dominant and recessive characteristics.
1. Fixation of Dominant Alleles Start with a population that has a gene with two alleles (A and a...
1. Fixation of Dominant Alleles Start with a population that has a gene with two alleles (A and a) with classical Mendelian dominance that are at equal frequency (p0.5. q 0.5). Assume this first generation is at hardy Weinberg equilibrium. Calculate the genotype frequencies AA- a. Aa b. Now assume some environmental change that makes the recessive phenotype completely unfit (fitness- 0). Calculate the allele frequencies and genotype frequencies in the second generation. (Hint: Your calculations might be easier if...
In simple Mendelian inheritance alleles display a simple dominant/recessive relationship. There are many exceptions to Mendelian...
In simple Mendelian inheritance alleles display a simple dominant/recessive relationship. There are many exceptions to Mendelian laws of inheritance. Most genes have more than two allelic forms and do not exhibit simple Mendelian inheritance. The human ABO antigens are an example of a multiple allelic trait. There are three ABO blood group antigens, IA, IB and i. The i allele is recessive to both IA and IB. A person who is homozygous ii has type O blood and does not...
In a population of Mendel's garden peas, the frequency of the dominant A (purple flower) allele...
In a population of Mendel's garden peas, the frequency of the dominant A (purple flower) allele is 80%. Letp represent the frequency of the A allele and q represent the frequency of the a allele. Assuming that the population is in Hardy-Weinberg equilibrium, what are the genotype frequencies? A. 16% AA, 40 % Aa, 44 % aa B. 80% AA, 10 % Aa, 10 % aa C. 50 % AA , 25 % As , 25 % aa * E....
1. Explain the differences between an intron and an exon? (4pts) 2. Why do you see...
1. Explain the differences between an intron and an exon? (4pts) 2. Why do you see different size bands in Homozygous recessive, Homozygous dominant and Heterozygous student sample in PTC experiment? (4pts) 3. In the PTC lab, we determined the frequency of two alleles, the "+allele" and the "- allele" in a sample population (our class). What was the difference between these two alleles? (4pts) 4. Define evolution be sure to include in your definition what actually evolves. (Spts) 5....
LOUISE Homework Quizzes & Tests A gene is composed of two alleles. An allele can be...
LOUISE Homework Quizzes & Tests A gene is composed of two alleles. An allele can be either dominant or recessive. Suppose that a rusband di wile, allele but do not have the disease, decide to have a child. Because both parents are carriers of the disease, each has one dominant normal-cell allele (S) and one recessive sickle-cell allele (s). Therefore, the genotype of each parent is Ss. Each parent contributes one allele to his or her offspring with each allele...
Match the following terms with the appropriate description
below:
a. alleles b. autosomes c. dominant allele d. genotype e.
heterozygous f. homozygote g. phenotype h. recessive allele i. sex
chromosomes
1. ________________ genetic make-up
2. ________________ how genetic make-up is expressed
3. ________________ chromosomes that dictate most body
characteristics
4. ________________ alternative forms of the same gene
5. ___________an individual bearing two alleles that are the same
for a particular trait 6. ________________ an allele that is
expressed, whether in...
1. Fixation of Dominant Alleles Start with a population that has a gene with two alleles (A and a) with classical Mendelian dominance that are at equal frequency (p0.5. q 0.5). Assume this first generation is at hardy Weinberg equilibrium. Calculate the genotype frequencies AA- a. Aa b. Now assume some environmental change that makes the recessive phenotype completely unfit (fitness- 0). Calculate the allele frequencies and genotype frequencies in the second generation. (Hint: Your calculations might be easier if...
In a population of Mendel's garden peas, the frequency of the dominant A (purple flower) allele is 80%. Letp represent the frequency of the A allele and q represent the frequency of the a allele. Assuming that the population is in Hardy-Weinberg equilibrium, what are the genotype frequencies? A. 16% AA, 40 % Aa, 44 % aa B. 80% AA, 10 % Aa, 10 % aa C. 50 % AA , 25 % As , 25 % aa * E....
1. Explain the differences between an intron and an exon? (4pts) 2. Why do you see different size bands in Homozygous recessive, Homozygous dominant and Heterozygous student sample in PTC experiment? (4pts) 3. In the PTC lab, we determined the frequency of two alleles, the "+allele" and the "- allele" in a sample population (our class). What was the difference between these two alleles? (4pts) 4. Define evolution be sure to include in your definition what actually evolves. (Spts) 5....
LOUISE Homework Quizzes & Tests A gene is composed of two alleles. An allele can be either dominant or recessive. Suppose that a rusband di wile, allele but do not have the disease, decide to have a child. Because both parents are carriers of the disease, each has one dominant normal-cell allele (S) and one recessive sickle-cell allele (s). Therefore, the genotype of each parent is Ss. Each parent contributes one allele to his or her offspring with each allele...
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