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What gene pair is made up of one dominant allele and one ressecive allele?
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∙ 11y ago
A heterozygous condition resulting in the dominant genes expression in the phenotype.
Wiki User
∙ 11y ago
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What is heterzygous in genes?
A heterozygous dominant gene is a gene that is more dominant in the gene pool but is made up of 2 diffrent traits passed from parent example: A heterzygous gene would be Tt for tall. The T stands for domintant trait as being tall and the t stands for the recessive trait short. All heterzygous means is that it is made up with 1 captial letter and 1 lowercase letter.
How does a allele cause a trait in a organism?
By definition, an allele is another form of a gene wherein it is usually subjected to a mutation in which it could be either classified as dominant or recessive. In addition, the utilization of an allele is among the common causes for determining the trait of an organism because "it causes a certain type of protein to form."
What are genetics passed from?
You get one allele, or a half of a gene, from each parent. That combination of alleles create a gene. You have different genes for each trait, but all genes are made from your parent's alleles.Read more: http://wiki.answers.com/How_do_you_inherit_genes#ixzz17AmtM8am
Is long hair in dogs a dominant trait?
Genetics is incredibly complicated microbiology, and this is an extremely oversimplified introduction to very basic genetic concepts. Please keep that in mind as you read through this page. Many people have dedicated their entire careers to the study of genetics, and much is being learned on a daily basis in the continuing field of genetic research.Genes, the unit of heredity in cells, are inherited from one's parents. They are made up of pairs of alleles in the individual. One gene allele is inherited from the mother (via the egg), and the other one from the father (via the sperm).Capital letters usually indicate a dominant gene allele, or one that is "stronger". Only one dominant allele of a gene pair needs to be present for that allele to be expressed (be evident). Dominant alleles mask, or hide, the recessive ("weaker") allele. The recessive allele must be inherited from both parents in order to be expressed. In other words they must be present as a pair to be shown. Recessives are indicated with a lower case letter.Most visible traits are produced by many genes interacting in the individual. These are called polygenic traits. But some traits are controlled by a single gene. For our theoretical simplified example, we will use a single gene trait.A = dominant allele a = recessive alleleIf A indicates short hair in a dog, for this example, and a indicates longhair, then:AA would be a shorthaired dog with no longhair recessive.Aa would be a shorthaired dog with a longhaired recessive, but you would not know it was carrying the longhaired trait by looking at the dog, since the dominant allele, A, masked the recessive allele, a.aa would be a longhaired dog , since the recessive alleles must be present in a pair to be expressed, however please see * Note below regarding the quantity of hair likely to be present in such a dog that had an Aa parent. As can clearly be seen, it is not possible for the aa dog to carry or pass on the dominant trait, which for this example, is shorthair..Forget all that ! I have been breeding dogs for over 55 years and i can tell you that the long coated dog is a dominate. If you breed 100 years of short coats and you breed one long coat into your short coat, you will get short coats, but if you choose the long coat pup and breed back to your long coat you will get a majority of long coats. Then you breed all long coats for 100 years and bred to a short coat you will retrace your steps in reverse. Once you have long coats you will never ever get a short coat unless you 'outcross' to a short coated breed. example is the American Cocker spaniel which can never go back to its former look. The judges and breeders chose to go with the long coat and now, you will never be able to get what the standards call for. All American Cockers should be thrown out of the show rings for non conformation to the standards of their breed. your answer is YES
How are alleles and genotypes related?
DNA is composed of long strings of nucleic acid sequences, but not all of them code for proteins. The ones that do are called genes. Alleles are different versions of a certain gene. For example, the gene that codes for blood type has 3 different alleles, A, B, and O. The genes that code for hair and eye color also have many different alleles.
How do you explain the principle of dominance?
Genetic dominance? One gene is dominant over the other gene in the chromosome pair by having it protein product made totally at the expense of the recessive gene, or the protein product dominates production. For instance, blue eye color is recessive to brown eye color. You have two alleles ( different molecular form of the same gene ) in this case; one from one parent and one from the other parent. Only the brown allele expresses and is called dominant then.
When an allele mask the presence of another allele it is said to be?
Dominent. Simple- you have two types of Alleles, Dominent and Reccessive. Imagine a punnet square for the allele that causes albinoism (A). One parent has Aa, or one dominent allele and one reccessive allele for the trait. If the dominent skin-tone gene wasn't there (A), then it would be AA and he would be an albino. But since he has a dominent allele, he has normal color. If he made a baby with another Aa combination, they would have 25% chance of having an AA baby with no reccessive allele, a 50% chance of having an identical Aa combination, and a 25% chance of having an albino baby, AA.
Which sentence correctly describes the relationship between genes and alleles?
She inherited brown eyes, a dominant allele in both her parents.
Two form of the same gene is called?
An indiviual letter in a punnett square representing a gene is called an allele. The two genes ( one from each parent ) together is a genotype. There isn't really two forms of a gene.
What does recessive tell us about gene's expression?
Recessive doesn't really describe the expression of a gene. When a gene is "expressed" a protein is made. Recessive describes what form of the gene is expressed or in other words, which allele. A recessive protein may look different and function differently than a dominant protein. This is oversimplified though because there are many different interactions and mechanisms that determine protein function.
What happened in Mendel's experiment when a pea plant received two different alleles for the same trait?
He did an experiment with a tall pea plant and a small pea plant. He then went through 2 generations of breeding of these plants and noticed 3 distinct different types of plants. One type was really short, the other was average height, and the final was Tall.He combined 2 medium sized plants with each other (Tt) and (Tt).*T = Tall gene.*t = shortness gene.Put that into you Punnett square and you will get these answers:The small plant had a recessive gene (tt).The medium sized plant had the average set of genes (Tt).The tall plant also had a recessive gene (TT).The results were:1 Small Plant, 2 Medium Plants, and 1 Large Plant.The recessive allele was hidden by the dominant alleleThe recessive allele was hidden by the dominant allele.the recessive allele was hidden by the dominant allele. (novanet)The recessive allele was hidden by the dominant allele.Novanet Swagnovanet:The recessive allele was hidden by the dominant allele!
A test cross made with a cat that may be heterozygous for a recessive trait what is the presumed genotype of the cat explain?
A test cross made for a heterozygous recessive trait would show a dominant gene and a recessive gene. The cat would have one dominant gene (A) and 1 recessive (a).
How alleles and genes related?
Genes and alleles are related because alleles are inside a gene. Genes are made up by alleles. A gene is DNA. The allele is like piece of DNA inside a gene.
If you are diagnosed with schizo-effective disorder can your future children inherit the disorder?
The allele for schizo-effective disorder is recessive, meaning that a person must inherit two genes (one from mom, one from dad), to actually have the disorder.It also means that if you or your partner has the disorder,If one of your families has no history of the disorder, chances are good thatLet's say schizo-effective disorder is represented with S or s.(lowercase symbolizes recessive, and capital is dominant)If you are diagnosed with Schizo-effective disorder, your genotype is ss.This is also called homozygous recessive.Let's say your spouse has no family history for at least 4 or 5 generations of this disorder. It is safe to assume, then, that he/she is homozygous dominant, or SS.The only allele you can pass on to your children is the recessive allele, since you have no dominant variation, and you must pass on one allele per gene to your children. This means that no matter what, your children carry the gene for schizo-effective disorder.The only allele your partner/spouse can pass on is the dominant allele, since we have made the assumption that both of her/his inherited alleles are 'normal' (negative for schizo-effective disorder).The dominant allele cancels out the effects of the recessive allele, so none of your children can actually have the disorder, but your grandchildren might, unless your children find another homozygous dominant partner.Note: Simply because a person does not have schizo-effective disorder does not mean that they are homozygous dominant. They may also be heterozygous, (Ss) like your children. this gives a 1/4 chance that your grandchildren will have the disorder. (this is also known as a monohybrid cross).
What is heterzygous in genes?
A heterozygous dominant gene is a gene that is more dominant in the gene pool but is made up of 2 diffrent traits passed from parent example: A heterzygous gene would be Tt for tall. The T stands for domintant trait as being tall and the t stands for the recessive trait short. All heterzygous means is that it is made up with 1 captial letter and 1 lowercase letter.
Difference between dominant and recessive genes?
dominant genes are more likely to be passed down to a child than recessive genes. Here's an example: A woman has black hair and blue eyes. Her husband has blonde hair and brown eyes. Their child will most likely have brown eyes and black hair, because black hair and brown eyes are dominant genes, while blonde hair and blue eyes are recessive. It is, of course, still possible for the child to be blonde and blue-eyed, only less likely. However, if the father had blue eyes too, it would be most likely that the child would have blue eyes. Grandparents are also a factor: say that both parents have blue eyes, but one or more of the child's grandparents (or anyone down the genetic line, actually) has brown eyes. It is therefore also possible for the child to have brown eyes. hope it helped
How does a allele cause a trait in a organism?
By definition, an allele is another form of a gene wherein it is usually subjected to a mutation in which it could be either classified as dominant or recessive. In addition, the utilization of an allele is among the common causes for determining the trait of an organism because "it causes a certain type of protein to form."
