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A recessive gene will stay with a person for their entire life. Whether it will become obvious that the person is carrying a recessive gene is dependant upon how many copies of the recessive gene the person carries - the effects of a recessive gene will only become obvious if two copies of the gene are carried. Excluding the option of undergoing DNA testing for the recessive gene in question, it is perfectly feasible for a person to live the whole of their life whilst never knowing they carry a recessive gene for a certain condition.
Wiki User
∙ 15y ago
Wiki User
∙ 14y agorecessive genes needs at least two copies of it's alleles for it to physically show. dominant only needs at least one.
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A cactus can either have long needles L or short needles l A cactus grower crosses two cacti what is the result what is the phenotype ratio for the cross?
All long (Ll) but carrying the recessive for short.
What is the answer to the Felix Mystery?
Felix is a type of mistry destruction. She is fantastic emotion of stupidos forgiving. Maybe matters is long but favourite way is lucky mind
How long can a person tread water?
It depends on the individual endurance.
How long does it take for someone to create a fart?
depends on the person.
Which sentence correctly describes the relationship between genes and alleles?
She inherited brown eyes, a dominant allele in both her parents.
Is a person who is homozygous recessive for a recessive genetic disese a carrier?
As long as a persons genotype consists of at least one recessive gene, they can pass it on to offspring to give them the disease, which makes them a carrier. Since this persons genes are both recessive, it is definite that they will pass on the recessive gene.
If a mouse inherits a dominant gene for a long tail and a recessive gene for a short tail what tail length will the mouse have?
whatever type of tail it wants to.Answer: When a dominant gene is present, it will always be expressed. The only time a recessive gene is expressed is when no dominant gene is present. Therefore, the mouse in question will have a long tail.
What is chromosomes theory of inheritances?
We have learned over a very long time that the chromosomes carry genes that determine who we are and what we look like. Some genes are dominate and some are recessive. A person with a widow's peak hair line shows a dominate gene for hair line. He may also carry a gene for "round" hair line but it is recessive and not seen.
Can two brown eyes make blue?
yes, as long as both of the genetic parents have the blue eye trait as a recessive gene
Can a person be a carrier for a dominant genetic disorder?
Anyone can be a carrier of a recessive genetic disorder (as long as it is not associated with the sex chromosomes) no matter what their gender since "carrier" refers to an individual that is heterozygous for the recessive allele and therefore phenotypically normal. Specifically, sexlinked genetic disorders can be "carried" by a heterozygous female but males (having only one X chromosome) cannot. Males will either be free of the defective gene or be affected.
What is the probability that a woman who is a carrier of the colorblind gene and a color blind man will have a first son who will be color blind?
The probability is 0 (but the daughter will be a carrier of the color blind gene). This is because the gene dictating whether someone is color blind or not is linked to the X chromosome (and not the Y). The color blind gene is a recessive gene whilst the normal color vision gene is a dominant gene. Hence if a girl (XX) has one normal vision gene (from one parent) and one color blind gene (from the other parent), her normal vision gene will be dominant to the recessive color blind gene and hence she will have normal vision (but she will be a carrier of the color blind gene). If both her parents contribute the recessive color blind gene to her, then she will be color blind. For a woman (XX) to be color blind, she needs to be have both genes to be recessive (ie where there is no dominant normal color vision gene to dominate). For a man (XY), as long as the X gene contributed by his mother is a color blind gene, he will be color blind because he has no other X chromosome where a dominant normal color gene could reside. Hence, to answer the question, a man with normal color vision (XY, with a dominant normal color vision X gene since the gene can't be the recessive color blind gene otherwise he will be colorblind) and a colorblind woman (XX, both recessive color blind genes), will each contribute an X each the child. The man will contribute his only X chromosome which carries the normal color vision X gene and the woman can only contribute a recessive color blind gene. The man's normal color vision X gene will be dominant, and hence the daughter will definitely have normal vision (despite being a carrier).
Does everyone have a recessive gene?
Yes. So do men. I believe it may be safe to say that any sexually reproducing individual will have at least some recessive genes. Women have 2 copys of the X chromosome, men have one copy of the Y chromosome and a single copy of the X chromosome. The Y chromosome contains much less information than the X chromosome. One of the genes on the Y chromosome is SRY this single gene prompts the body to develope into a male when the embyo is in the womb. In this case men have the gene and women don't have the gene, rather than women having a recessive copy of it. There are some XY women who have the SRY gene but lack a different gene which codes for the androgen receptors.
If mother is A positive and dad is A positive what is the child's blood type?
My husband is A+ and I am O-. We have two children. Our daughter is O+ and our son is A+. A is dominant, O is recessive. + is dominant, - is recessive. Therefore in this situation it is possible to have children with O+, O-, A+, and A- so long as the father carries the recessive genes.
Are dominant or recessive alleles easier to remove by selection?
Natural selection favors whatever allele provides a selective advantage, so in theory it can operate on either. However, if a recessive allele provides an advantage it will soon shift and become the dominant allele, so it could be argued that natural selection favors dominant alleles. This is only partly true. A dominant gene always has some effect on the characteristics of the organism, even if the owner only has one of them. A recessive gene only affects the characteristics if there is no equivalent dominant gene to mask the effect. If both parents possess the recessive gene there is a chance the offspring will have two of them and this will show in their characteristics. When this happens, natural selection operates on the recessive gene. Much of the time, a recessive gene is present but natural selection does not affect it because there is a dominant gene that masks the effect. If natural selection favours the recessive gene, the dominant gene will quite quickly disappear from the population. This does not make the recessive gene 'dominant' it's just tht there's no longer any competition. If selection favours the dominant gene however, the recessive gene can linger in the population for much longer, because even when it is present, it is not selected against for most of the time. That is why conditions like heamophilia survives for a long time in humans, and you suddenly discover a white deer after many years in a herd of brown deer.
Why is selective breeding a slow process?
because when you take a gene from another species they don't always turn out the way you whant them to for example; if you take a gene from a blue plant and put it into a red plant you might get a verious of colour because somewhere in the family tree there would be a different colour of parents.
How can a lethal allele continue to be present in a gene pool even when they are selected against?
A harmful recessive allele remains in the population because both homozygous dominant and heterozygous genotypes produce the dominant, healthy phenotype. So the heterozygous genotype keeps the harmful recessive allele in the population.
What evidence is there that the long and round did not become blended?
A number of genetic disorders are caused when an individual inherits two recessive alleles for a single-gene trait. Recessive genetic disorders include Albinism, Cystic Fibrosis, Galactosemia, Phenylketonuria (PKU), and Tay-Sachs Disease. Other disorders are also due to recessive alleles, but because the gene locus is located on the X chromosome, so that males have only one copy (that is, they are hemizygous), they are more frequent in males than in females.
