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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.
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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.
Why do you not look excactly like your parents?
you do not look exactly like either of your parents because you are a combination of both your parents and take traits from each of them so you look like a mix. Also if you have traits that neither of your parents have it is because you are homozygous for a recessive trait that both your parents were carriers for. note: If you have two white parents and look half black your mom likes to party.
What does escargot look like?
They are snails & look like them.
What do sea lamprey look like?
They look like eels.
What do the bird spatzy look like?
what does a spatzi look like
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 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).
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.
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.
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)
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.
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 Does the phenotypic distribution look like in a population that is not undergoing natural selection for a certain trait?
The distribution will center towards hetrotrophs and thus dominant phenotypes. The distribution approaches all dominant phenotypes
If snapdragons showed complete dominance like pea plants what would the offspring look like?
If snapdragons showed complete dominance, the offspring would display the dominant trait from one parent. This means all the offspring would have the same physical appearance as the parent with the dominant trait, without any variation.
Is the dominant trait always expressed?
A dominant gene will be expressed if paired with a recessive gene or with a dominant gene for the same trait. For example, the trait for brown eyes (BB) is dominant over blue eyes (bb) - thus an offspring Bb will express brown eyes, just as BB.
