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What is homozygous dominate heterozygous and homozygous recessive look like?
Homozygous dominant individuals carry two identical dominant alleles (e.g., AA) and typically express the dominant trait. Heterozygous individuals have one dominant and one recessive allele (e.g., Aa), exhibiting the dominant trait while carrying the recessive one. Homozygous recessive individuals possess two identical recessive alleles (e.g., aa) and express the recessive trait. The phenotypic expressions of these genotypes depend on the specific traits being studied.
How do you prove if something is heterozygous?
The carrier must be Homozygous because if he were hetero it must be Hh and the dominant gene is expressed but homozygous gives them the possibility of hh (only a carrier) or HH (definitely a carrier) Don't totally understand the previous answer; however, I understand the question to mean that you want to know if you are homozygous or heterozygous for a certain trait. If you express a recessive phenotype, that is you have blue eyes for example, you are definitely homozygous for that trait. If one of your parents has a recessive trait, like blue eyes, and the other parent expresses a dominant trait, like brown eyes, AND if you have brown eyes, you can be sure that you are heterozygous. Otherwise it is impossible to tell until you have children. Then you can work backwards from you and your spouse, look at their parents and your parents and then figure the only possible way all those conditions could exist is if you are heterozygous or if you are homozygous for that trait.
What is the outcome of an organism acquiring a recessive gene?
It all depends on if they acquire 1 recessive or 2 recessive genes. If they have two, then they will get that recessive gene automatically. It will look like this in a Punnett Square: rr(two lowercase). If they only receive one, they will be carriers of the recessive trait, but they will not obtain it. They could pass it on to their offsrping, but they themselves with have the dominant gene. It would look like this in a Punnett Square: Rr (one lowercase, one uppercase).
Another plant is said to be heterozygous for flower color what does this mean?
homozygous means that the alleles that make up the genotype are the same, for example homozygous dominant would have two dominant alleles (RR) or homozygous recessive would have two recessive alleles (rr). the alternative would be heterozygous, where the genotype contains both a dominant and a recessive allele (Rr). so a homozygous plant would either have two dominant alleles or two recessive alleles for the seed colour. Now the way to find out whether it is homozygous dominant or homozygous recessive is to do a cross with a homozygous recessive plant and look at the seed colour (the phenotype). if the the original genotype is homozygous dominant the offspring seed colour will show the dominant seed colour becasue it will be heterozygous. But if the original plant is homozygous recessive the offspring will show the recessive phenotype.
How are recessive trait inherited?
What is the relationship between dominant and recessive traits? Think of it this way-- A dominant gene will suppress the expression of a recessive gene. A dominant trait is the expressed result of an organism having either one dominant and one recessive gene for that trait, OR two dominant genes for that trait. For example, brown eye color is normally dominant over blue. A recessive trait is the expressed result of having two recessive genes. For example, you need two recessive genes to get blue eyes. Each parent contributes one gene for each trait. If a parent carries a recessive gene for blue and a dominant gene for brown, that parent will have brown eyes, but can contribute either gene to a child. If the other parent has the same, the child could have two brown eyed parents but have blue eyes. Eye color is a visible trait, but each gene location can be or contribute to a trait not visible to the eye. For example, the genetic disposition to ovarian cancer is not something we can see without genetic testing. A recessive gene can be inherited and remain silent for generations, waiting to pair up with another recessive to be expressed. The knowledge that this does occur is one of the reasons why genetic testing is recommended before having children. There are so-called lethal genes that are recessive and only become problematic when they meet up with another. I know I have simplified things here, but I hope that gets to the core of your question. I recommended taking a look at the OMIM.org website to appreciate how complex this really is. That the unraveling of the miracle of the human genome has been accomplished during the last decade is truly wonderful.
What is the differences between homozygous dominant and homozygous recessive and heterozygous?
Homozygous dominant individuals have two copies of the dominant allele for a trait, homozygous recessive individuals have two copies of the recessive allele, and heterozygous individuals have one copy of each allele. Homozygous dominant and heterozygous individuals will express the dominant trait, while homozygous recessive individuals will express the recessive trait.
What is homozygous dominate heterozygous and homozygous recessive look like?
Homozygous dominant individuals carry two identical dominant alleles (e.g., AA) and typically express the dominant trait. Heterozygous individuals have one dominant and one recessive allele (e.g., Aa), exhibiting the dominant trait while carrying the recessive one. Homozygous recessive individuals possess two identical recessive alleles (e.g., aa) and express the recessive trait. The phenotypic expressions of these genotypes depend on the specific traits being studied.
What does a homozygous dominant trait look like?
A homozygous dominant trait occurs when an individual inherits two identical dominant alleles for a specific gene. The trait is fully expressed, as dominance masks recessive alleles. For example, in pea plants, homozygous dominant (RR) for flower color results in purple flowers, visibly demonstrating the dominant trait without variation. visit our website: www. chocolatekidsplayschool.org/madambakkam/
What would the alleles of a heterozygous trait look like?
In a heterozygous individual, the alleles for a trait are different. Each allele may be represented by a different letter (e.g., Aa), where one allele is dominant and the other is recessive. The dominant allele is typically expressed in the phenotype, while the recessive allele is not unless the individual is homozygous recessive.
Is a recessive gene expressed?
Ok, im assuming your question is "if two recessive alleles are present will the trait be expressed" A trait will be expressed if two alleles are recessive but it will not be the same representation as two dominant alleles. For example, T being a tall pea plant and t being a small pea plant. Two recessive alleles or, homozygous recessive, alleles The other option would be there is one dominant and one recessive, heterozygous, which would look like Tt. This would take on the trait of the dominant allele usually expressed by the capital letter. So this heterozygous plant would be tall.
The F1 offspring of Mendel's classic pea cross always looked like opne of the two parental varieties because?
Because Mendel crossed two pure-breeding plants. One being homozygous dominant and one being homozygous recessive. All of the progeny ended up being heterozygous, causing them to take on the dominant phenotype and look like the homozygous dominant parent.
Why is it impossible for offspring to show the recessive trait if one parent is homoygous for the dominant trait?
Because the parent with the homozygous alleles for the dominant trait can only pass on that dominant allele to its offspring and the dominant allele, if present, is always expressed.
What is the difference between a dominant trait and a recessive trait?
A dominate trait will most likely take over the recessive.
Are the dominant traits always the most common in a population?
it is because that trait is more dominant. when a dominant and a recessive trait combine it is most likely that hte dominant trait will be expressed. it is only when a recessive trait combines with an another recassive trait that hte trait gets expressed(which is rare and not so commonly occuring)
What is the phenotype of a homozygous dominant person?
Homozygous dominant- means having dominant alleles at the same locus on a chromosome.More correctly, it's the same locus on two chromosomes (a homologous pair).
How do you prove if something is heterozygous?
The carrier must be Homozygous because if he were hetero it must be Hh and the dominant gene is expressed but homozygous gives them the possibility of hh (only a carrier) or HH (definitely a carrier) Don't totally understand the previous answer; however, I understand the question to mean that you want to know if you are homozygous or heterozygous for a certain trait. If you express a recessive phenotype, that is you have blue eyes for example, you are definitely homozygous for that trait. If one of your parents has a recessive trait, like blue eyes, and the other parent expresses a dominant trait, like brown eyes, AND if you have brown eyes, you can be sure that you are heterozygous. Otherwise it is impossible to tell until you have children. Then you can work backwards from you and your spouse, look at their parents and your parents and then figure the only possible way all those conditions could exist is if you are heterozygous or if you are homozygous for that trait.
If a hornless bull mates with a horned cow what are the two genotypes of the two parents?
Hornless = polled. Polled cows and bulls can be either homozygous polled or heterozygous polled. So, since we have no idea of what kind of calf they produce, the genotypical cross will look like this: (H = polled and h= horned) H_ x hh "H_" symbolizes the unknown allele that the polled bull has. Is he hetero polled or homozygous polled? The "hh" of the cow symbolizes she is homozygous horned, since the horned trait in cattle is a recessive trait: polled gene is dominant.
