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If the sickle cell trait were a dominant trait rather than a recessive one could it still be balanced polymorphism?
Wiki User
∙ 15y ago
the polymorphism is only balanced when the dominate trait is recessive in the cell which came from the daughter cell after division, hence the dominate characteristics.
Wiki User
∙ 15y ago
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Is tongue rolling a dominant trait?
no it is recessiveFamily studies clearly demonstrate that tongue rolling is not a simple genetic character, and twin studies demonstrate that it is influenced by both genetics and the environment. Despite this, tongue rolling is probably the most commonly used classroom example of a simple genetic trait in humans. Sturtevant (1965) said he was "embarrassed to see it listed in some current works as an established Mendelian case." You should not use tongue rolling to demonstrate basic genetics.No. Your mom is.
How is sickle-cell disease a representation of codominance?
It's not sickle-cell itself, but rather being a heterozygous carrier of the disease. People with one dominant and one recessive allele for the disease are immune to malaria without the crippling effects of having sickle-cell anemia. I don't think that it can even represent codominance, though.
Why are some peoples DNA stronger than others?
I don't think it is accurate to say that some people's DNA is stronger than others, rather, some traits are more dominant than others. For example, darker features (dark hair, brown eyes, dark skin) are dominant over recessive genes (blond hair, blue eyes, etc). However, when two recessives are combined, that trait can be expressed which is why a couple with a darker person and a lighter person can end up with a blond haired, blue-eyed child. If both parents carry the genes for blond hair and blue eyes, the child could very well end up with blond hair and blue eyes, even though one of the parents is dark. It all depends on the genetics of family lines, which is why there are times when mixed-race couples have light children- if both parents carry the recessive genes for lighter features, there's a good chance they will be expressed. Not all traits fall into clear cut parameters of being dominant or recessive. Beyond what we know about which traits are dominant vs. recessive, everything else is pretty much left up to the genetic lottery- how genes are paired up, and which ones are randomly selected over others.
What would happen if you were all clones of your mother and father rather than a genetic combination of an egg and a sperm cell?
So you're asking what if you were conceived as a "test tube baby" rather than the old-fashioned way. Well when looking at the egg and sperm cell (when fertilized zygote) it is dependent on the dominant and recessive genes you receive from your parents, from the mix a new person arises with similar traits to their parents. I suppose with cloning you would be an exact blend. But then again the whole recessive and dominant gene idea would re-occur. Basically, if the cloning was carried out without supervision you would essentially receive the same results as conception. But this process could be advantageous in that you would be able to have a child that is a part of both parents but with advanced genetics you could pick the parts of your child you want and ones that you do not. Such as, hair colour, eye colour, perfect pitch, mathematical ability, etc.
Is Autism recessive?
At this point, no one can say for certain that autism is even a genetic trait, as the causes are not fully known or understood. There are certainly some genetic factors that seem to play into whether someone will develop autism, but it isn't as simple as dominant/recessive genes. Environmental factors, diet, vaccines, and other variables have also been suspected as autism causes or triggers. If it were strictly a genetic disorder, it would be a recessive trait. If it were dominant, the number of people with autism would be much greater. The logic behind that is probably beyond the scope of this question.
Why is there a greater chance of getting a dominant trait rather than a recessive trait?
A dominant trait occurs when either both alleles are dominant or one allele is dominant and the other is recessive. This is because a dominant allele overpowers a recessive allele. In order to have a recessive trait both alleles must be recessive.
Dominant traits in terms of heredity?
when a dominant trait combines with a recessive trait the dominant one is expressed in the offspring. Aa AA Aa AA aA AA The Aa represents or rather expresses the dominant trait.
What is the difference between a dominant trait and a recessive trait?
A dominate trait will most likely take over the recessive.
State Mendel's principle of dominance?
Only the dominant trait can be seen in an organism that is hybrid for a pair of contrasting traits
What is the letter that represents a recessive allele?
Very often lower case letters are used to show recessive traits, and upper case for dominant, but this is not universal. Also, most traits aren't dependent on only one gene or "on/off" switch, but are rather part of a spectrum.
Is blood type o recessive or dominant?
O is the most recessive blood type. And RH- negative is recessive. There are a limited number of Blood Type Combinations. AA, AO, BB, BO, AB, OO. Blood Type can be determined with some certainty by using a Pundit Square. EXAMPLE AO x OO would result in First Filial Progeny of 50% AO and 50% OO. or AA x BO would result in FIrst Filial Progeny of 50% AO and 50% AB.
Bobtails in cats are recessive?
rather TT Tt tt
Is Edward's syndrome caused by a recessive gene?
Edward's syndrome is not technically recessive or dominant, because it is not caused by a single gene. Rather it happens due to a trisomy of chromosome 18 (or just of a part of said chromosome). Parent's may be healthy and still have offspring with the syndrome not because its recessive, but because the trisomy arises during meiosis of the gametes. Whatever happens to the gametes affects only the offspring not the carrier parent.
When one trait is not completely dominant over another?
This is called codominance in this case, neither allele is dominant over another, it creates in heterozyogous individuals a phenotype that is not in intermediate, nor the phenotype either of the two alleles create, but rather, a different phenotype.
Why would a variation help a population?
Well, there isn't really an answer to that but here's my opinion. Some of these could be genetic mutations which help rather than harm the individual. They can pass it on to their offspring, and the cycle will continue to spread until it becomes a recessive (or less dominant) trait.
How can a lethal gene be passed from one generation to the other?
If the lethal gene is recessive, and the parent carrying it is heterozygous for that gene, it can be passed down to offspring in the recessive form. If the mate of the parent happens to be carrying the same gene heterozygously, 50% of offspring will be expected to inherit the recessive lethal gene heterozygously. 25% of the offspring will be expected to inherit the lethal gene homozygously, leading to death. The remaining 25% of offspring we will expect to homozygously inherit the non-lethal gene. 1:2:1 ratio
Is tongue rolling a dominant trait?
no it is recessiveFamily studies clearly demonstrate that tongue rolling is not a simple genetic character, and twin studies demonstrate that it is influenced by both genetics and the environment. Despite this, tongue rolling is probably the most commonly used classroom example of a simple genetic trait in humans. Sturtevant (1965) said he was "embarrassed to see it listed in some current works as an established Mendelian case." You should not use tongue rolling to demonstrate basic genetics.No. Your mom is.
