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Is it easier to analyze genotype by observing phenotype in organisms with complete dominance or in organisms with incomplete dominance?
It is easier to analyze genotype by observing phenotype in organisms with incomplete dominance (also known as codominance), because in incomplete dominance the individual will show a specific phenotype for each situation, whether it is homozygous dominant, heterozygous, or homozygous recessive. For example, in flowers, such as the ones that Mendel studied, a homozygous dominant flower will be red, a homozygous recessive flower will be white, and a heterozygous flower will be pink. In complete dominance, a heterozygous will only express the dominant phenotype, as opposed to incomplete dominance, in which a heterozygous individual will express a phenotype that is representative of both of the dominant and recessive traits. Because heterozygous individuals in complete dominance express the dominant phenotype, it is hard to determine whether the genotype is homozygous dominant or heterozygous for the trait. Hope this helps!
What is meant by heterozygous advantage?
Heterozygous advantage refers to a situation where individuals with two different alleles for a particular trait have a survival or reproductive advantage over individuals that are homozygous for either allele. This advantage can result in genetic diversity within a population, which can be beneficial for the population's ability to adapt to changing environments.
When a tall homozygous plant was crossed with a short homozygous plant the F1 offspring were all tall. No short plants were present in the F1 generation. Which principle does this situation represent?
This situation represents Mendel's principle of dominance. In this cross, the tall allele is dominant over the short allele, resulting in all F1 offspring exhibiting the tall phenotype. Since both parent plants are homozygous, the F1 generation inherits one tall allele from the tall parent and one short allele from the short parent, but only the dominant tall trait is expressed.
Is Hypercholesterolemia incompletely dominant?
Hypercholesterolemia is typically considered an autosomal dominant condition, meaning that having just one copy of the mutated gene from one parent is enough to cause the disorder. Incomplete dominance refers to a situation where a heterozygous individual shows an intermediate phenotype between the two homozygous conditions, which is not the case for hypercholesterolemia.
Explain the difference between intermediate inheritance and codominance?
In codominance, neither phenotype is recessive. Instead, the heterozygous individual expresses bothphenotypes. Intermediate inheritance is when neither allele is dominant to another, but a mixture is produced in the 2 alleles present. A mixed phenotype is given that is between the two parents phenotype .e.g Red flowers (RR) crossed with white flowers (WW) produces pink flowers (RW).
What is it when you have a gene pair that consist of two dominate alleles and two recessive alleles?
The name of the gene pair that consists of a dominant and recessive allele, i.e. (Xx) will be a heterozygous allele. In this situation, the characteristics of the dominant characteristic will mask that of the recessive allele. People have have a heterozygous genotype may be carriers for diseases that reside on the recessive allele.
Is it easier to analyze genotype by observing phenotype in organisms with complete dominance or in organisms with incomplete dominance?
It is easier to analyze genotype by observing phenotype in organisms with incomplete dominance (also known as codominance), because in incomplete dominance the individual will show a specific phenotype for each situation, whether it is homozygous dominant, heterozygous, or homozygous recessive. For example, in flowers, such as the ones that Mendel studied, a homozygous dominant flower will be red, a homozygous recessive flower will be white, and a heterozygous flower will be pink. In complete dominance, a heterozygous will only express the dominant phenotype, as opposed to incomplete dominance, in which a heterozygous individual will express a phenotype that is representative of both of the dominant and recessive traits. Because heterozygous individuals in complete dominance express the dominant phenotype, it is hard to determine whether the genotype is homozygous dominant or heterozygous for the trait. Hope this helps!
What is meant by heterozygous advantage?
Heterozygous advantage refers to a situation where individuals with two different alleles for a particular trait have a survival or reproductive advantage over individuals that are homozygous for either allele. This advantage can result in genetic diversity within a population, which can be beneficial for the population's ability to adapt to changing environments.
Which term describes the example below- A child with no freckles has a mother who has freckles and is heterozygous and a father who has no freckles and is homozygous recessive?
We'llsay F is dominant for freckles and f is recessive for non-freckled. The father is ff The mother is Ff The child is ff. Probability of this cross producing a homozygous recessive child is 50%. There isn't a precise term for this cross.
When a tall homozygous plant was crossed with a short homozygous plant the F1 offspring were all tall. No short plants were present in the F1 generation. Which principle does this situation represent?
This situation represents Mendel's principle of dominance. In this cross, the tall allele is dominant over the short allele, resulting in all F1 offspring exhibiting the tall phenotype. Since both parent plants are homozygous, the F1 generation inherits one tall allele from the tall parent and one short allele from the short parent, but only the dominant tall trait is expressed.
Is Hypercholesterolemia incompletely dominant?
Hypercholesterolemia is typically considered an autosomal dominant condition, meaning that having just one copy of the mutated gene from one parent is enough to cause the disorder. Incomplete dominance refers to a situation where a heterozygous individual shows an intermediate phenotype between the two homozygous conditions, which is not the case for hypercholesterolemia.
What is it when alleles are neither dominant or recessive?
It is called CODOMINANCE if the alleles each express when the phenotype is heterozygous. Let's look at the following situation. There are snapdragon flowers that are homozygous (having 2 of the same allele) for red. Let's call them R. There are also snapdragon flowers that are homozygous for white. Let's call them r. If you take one of the RR flowers and breed it with a rr flower, you will get Rr. If one of the alleles is dominant, then the flower will be the color of the dominant allele. If R (red) is the dominant allele, then all of the offspring will be red; if r (white) is the dominant allele, then they will be white. However, if they are codominant, then if the genotype is heterozygous (Rr), then the alleles will both express- in this case, the offspring would be pink. Hope I helped!
Explain the difference between intermediate inheritance and codominance?
In codominance, neither phenotype is recessive. Instead, the heterozygous individual expresses bothphenotypes. Intermediate inheritance is when neither allele is dominant to another, but a mixture is produced in the 2 alleles present. A mixed phenotype is given that is between the two parents phenotype .e.g Red flowers (RR) crossed with white flowers (WW) produces pink flowers (RW).
How is co dominance and incomplete dominance similar?
Both co-dominance and incomplete dominance involve a situation where alleles do not follow the traditional dominant-recessive pattern of inheritance. In both cases, heterozygous individuals show a phenotype that is a blend of the two homozygous phenotypes. The main difference is that in co-dominance, both alleles are fully expressed, while in incomplete dominance, the phenotype is a mix of the two alleles.
What does it mean to represent a situation with an expression?
Use a variable to represent the situation. For example: John is 10 years older than Frank. Frank would be represented by x John is x+10
An expression that uses words to represent a real-life situation?
Fraction!
The phenotypic ratio for a testcross with a homozygous individual and a heterozygous individual is?
If you're given a general situation, it's best to make one up of your own and see the results. Say the dominant trait is B and the recessive trait is b. Therefore, a heterozygote would be Bb. If you cross a Bb with a Bb, you will get BB, Bb, Bb, and bb. Any offspring with just one dominant allele will have the dominant trait. So three of the four (75%) are phenotypically dominant and one of the four (25%) is phenotypically recessive.
