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Why is it impossible for offspring to show the recessive trait if one parent is homoygous for the dominant trait?
Wiki User
∙ 11y ago
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.
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoHeterozygous means that it has 2 different genes, so it will have both the dominant and recessive genes. The dominant gene would control the phenotype, so you wouldn't see the recessive trait.
Wiki User
∙ 14y agoBecause, if it is a heterozygous trait, then it is Rr (for example) or rR. But since you have to write heterozygous genotypes with the capital letter and then the lowercase letter, then it would always be RR. Recessive would be rr.
Wiki User
∙ 11y agoIf an allele is recessive both chromosomes have to have the allele inorder for the characteristic to be expressed.
If A (bay) is dominant over a (black) then AA and Aa are phenotypically bay.
In order to look black both alleles at the A gene locus must be b as in bb.
Wiki User
∙ 11y agoRecessive alleles can be expressed only when there is a homogenous combination of recessive alleles. That is, recessive alleles are only expressed, when there are no dominant alleles in the gene. So, 'A' being dominant and 'a' being recessive allel, the following genes have a dominant phenotype: 'AA' (homogenous dominant) and 'Aa' (heterogenous). The following have a recessive phenotype: 'aa' (homogenous recessive). All this is assuming that there are only 2-allel genes and there is no co-representation (difference in phenotype between 'AA' and 'Aa').
Wiki User
∙ 7y agoHomozygous recessive traits are typically rare in populations because tallness is dominant, a TT individual is homozygous dominant for that trait. A short plant would always have two alleles for shortness (tt). It would therefore, always be homozygous recessive.
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∙ 12y agoyes we are learning about theme in science.we learned about it 2 weeks ago
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∙ 11y agofbf bch
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When is a recessive allel expressed in offspring?
A recessive phenotype is expressed in an offspring that has a homozygous recessive genotype for that trait.
Do Parents with the dominant phenotype cannot have offspring with the recessive phenotypeous for a trait that is?
No. Parents with the dominant phenotype might be heterozygous in their genotype. This means they could carry both the dominant and recessive allele for a trait. So they could both pass the recessive allele to an offspring, who would then have the homozygous recessive genotype and recessive phenotype.
In which offspring does a dominant trait appear?
if a trait is recessive, it can only be expressed if its other trait is recessive as well. If the other trait in the genotype is dominant, it will block the recessive factor. But if both are recessive, they will be able to be seen in the offspring.
What does the word dominant mean in genetics?
The dominant overpowers the recessive traits. The dominant trait is the trait the the offspring will most likely have.
What is the result of a cross between an individual who is homozygous dominant and another who is homozygous recessive for a trait?
All the offspring will be heterozygous with a phenotype showing the dominant trait. Let the alleles be H (dominant) and h (recessive). All the gametes from the first individual will be H, and from the other, h. Thus all the offspring must be Hh.
Is a disorder know as a dominant or recessive?
Dominant disorders can be passed onto the offspring if the dominant gene is present in the offspring.
If a dominant homozygous reproduced with a heterozygous could their offspring be recessive?
Let's see what combinations can be formed.HH, HH, Hh, Hh.So, yes their offspring can contain the recessive allele.(THe offspring can be a carrier of the recessive allele.)However, since it is impossible for the offspring to be homozygous recessive,the recessive trait/gene will not show in the offspring's phenotype.Hope that helps!
If an animal with 2 dominant genes for a trait has offspring with an animal with 2 recessive genes for same trait their offspring can only have what?
Their offspring will have dominant genes. However, if these offspring have offspring with an amimal with recessive genes, the recessive genes will show up.
Is it possible to have a dominate recessive trait?
no, because dominant is different from recessive, its impossible to have a dominant-recessive trait because the dominant is when only one copy of the gene is present, while in the recessive a trait that must be contributed by both parents in order to appear in the offspring, in short the dominant is for single parent, while in the recessive is a product of two parents.
When is a recessive allel expressed in offspring?
A recessive phenotype is expressed in an offspring that has a homozygous recessive genotype for that trait.
What is the percentage of offspring that will exhibit the dominant trait from A crossing of A homozygous dominant and homozygous recessive individual?
The homozygous dominant individual can only pass on the dominant allele and the homozygous recessive individual can only pass on the recessive allele, therefore all offspring will be heterozygous and have the dominant phenotype.
How can offspring inherit a recessive trait?
An offspring can inherit a recessive trait if both of its parents are homozygous for the dominant allele.
Do Parents with the dominant phenotype cannot have offspring with the recessive phenotypeous for a trait that is?
No. Parents with the dominant phenotype might be heterozygous in their genotype. This means they could carry both the dominant and recessive allele for a trait. So they could both pass the recessive allele to an offspring, who would then have the homozygous recessive genotype and recessive phenotype.
Are recessive traits are always shown in an organism offspring?
No, a recessive trait will only show in the offspring if there is no dominant allele masking it. The trait that will always show in the offspring is the dominant allele, provided one parent was homozygous for it.
Are Recessive traits always shown in an organism's offspring?
No, a recessive trait will only show in the offspring if there is no dominant allele masking it. The trait that will always show in the offspring is the dominant allele, provided one parent was homozygous for it.
What do organisms pass to their offspring?
They pass on traits. There are recessive traits and dominant traits. The dominant trait is normally the one that overpowers recessive
How is sickle cell alleles maintained through natural selection?
Heterozygous induviduals pass the dominant and recessive alleles to offspring
