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When a recessive gene is inherited from only one parent and a normal gene is inherited from the other parent will the offspring have the condition?
Wiki User
∙ 10y ago
A recessive trait shows up when there is no dominant trait to mask it. For example, say the allele for brown hair is B and for red hair is b. If the father contributes an allele for brown hair and the mother contributes and allele for red hair, the child's phenotype would be Bb and it would have brown hair. However if both parents contributed an allele for red hair, the child's phenotype would be bb and it would have red hair. You can do the same thing for eye color. Say the allele for green eyes is G and the allele for blue eyes is g (I don't know if this is actually correct, but it's just an example). If the father gives the allele for green eyes, G, and the mother gives the allele for blue eyes, g, the child's phenotype is Gg and it has green eyes. However, if both parents contribute alleles for blue eyes, then the child's phenotype is gg and it has blue eyes.
Wiki User
∙ 14y ago
Wiki User
∙ 15y agoA family tree is a great idea, but the science is based on probability. The
probability that a recessive trait will show up in a family is 25% if both
parents are carriers. In order for a recessive trait to show up in a person,
he/she must inherit a copy of the recessive trait from both parents. If one
parent is recessive, let's say "rr" and the other parent is a carrier, say
"Rr", the probability is 50%. If both parents are recessive, the probability
is 100% (rr x rr). If neither parent carries the trait the probability is 0%
(RR x RR). BUT, this only tells you what MIGHT happen. We all know that the
probability of having a boy is 50:50, but we all know families of all boys.
So it would be interesting to see if the probability works out in your
family. If you do a search on the web for "genetics" or "probability and
genetics" you will get plenty of hits.
vanhoeck
Wiki User
∙ 12y agoIn a question of pure Mendelian dominance/recessiveness there would be 3 cases that match your condition:
If both parents are heterozygous (Aa), neither parent would display the trait.1/4 AA, 1/2 Aa, and 1/4 AA (Aa carries and AA displays trait)
If one parent is heterozygous (Aa) (does not display) and the other parent is homozygous (AA) recessive (displays trait)
1/4 Aa, 3/4 AA (AA displays trait)
If both parents are homozygous recessive (AA) (both display trait)100% AA (AA displays trait)
Wiki User
∙ 12y agoIf the other parent has a dominant gene, than yes it can be recessive.
If you are taking about one parents as in a plant ( or asexual reproduction)
the offspring has exactly the same genes as its parent, so there are no recessive genes.
Wiki User
∙ 15y agoWhen two heterozygous parents are crossed together. Ex: Ff x Ff= FF, Ff, Ff, ff
1:2:1 ratio. There is a 25% chance the recessive trait will show up.
Wiki User
∙ 10y agoNo, a not if it is an autosomal gene, however your phrasing implies that it is. a recessive gene must be inherited from BOTH parents to cause the disease.
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How are sex linked traits inherited?
Sex-linked traits are inherited from the organism's parents.
A is a condition of abnormal structure or function of the body and a is a disruption of interference with normal function?
Dominant gene eg as in Huntington's chorea. H represents Huntingtons dominant trait not the normal condition. AA abnormal, Aa abnormal however possibilty of subsequent offspring of Aa and Aa being aa therfore normal!
Hemophilia is a sex linked recessive disorder Mary does not have the disease but both of her brothers do Neither of her parents have the disease What are Marys parents genotypes indicates pr?
Mary's father is normal and has a normal genotype XY while her mother is the carrier of hemophilia and has one X of her genotype infected i.e. she is X*X.
Is albinos genes formed from mutation?
Albino is a rare condition that causes color not to appear in people. You would be albino if your hair and eyebrows were an off white, you were very pale, and in some cases got sunburned easily. If you are concerned for whatever reason, ask someone like your parents or loved one.
Are lobe eyes a recessive trait in drosophila?
yes, vestigial wings are recessive and autosomal.
When recessive gene for disease is inherited?
Recessive gene alleles are ones for which two copies are required to cause disease. Many people may have one copy and be phenotypically normal (non-diseased). People who have the disease will have gotten one copy from each parent, each of whom may be normal unless they, themselves have two copies.
Is sickle cell disease dominant or recessive?
The disease is recessive, requiring both parents to carry the allele for the disease to be found in the offspring. If one parent has it, the offspring can also be a carrier, but it will be recessive, and the offspring will have normal RBC (red blood cells)
Why can Cystic fibrosis be inherited even if neither parent has the disease?
Cystic Fibrosis is an example of a disease inherited as an autosomal recessive genetic disorder. Both parents of a baby who has Cystic Fibrosis have one abnormal recessive gene and one normal dominant gene and are therefore, Cystic Fibrosis carriers. Carriers are said to be heterozygous because they contain one normal copy of the gene and one abnormal copy. A baby who inherits cystic fibrosis has inherited the abnormal gene from both parents and is therefore said to be homozygous recessive.
What percentage of the offspring of a normal heterozygous (Dd) dog and a deaf dog (dd) would be expected to have normal hearing?
Fyugugy
How are sex linked traits inherited?
Sex-linked traits are inherited from the organism's parents.
What is thalesemmia entermedia?
Thalassemia Intermedia is a recessive trait inherited disease of the red blood cells. In thalassemia, the genetic defect results in reduced rate of synthesis of normal hemoglobin chains.
Is muscular dystrophy inherited?
Duchenne muscular dystrophy inheirited recessively meaning it is not passed nessicerially every generation. DMD is recessive it explain why boys commonly get it, affeted fathers pass it on to 50% of daughters and none of his sons assuming the mother is normal. The daughters aren't affected by the disease but they passes it on to 50% own sons and none of there daughters assuming the father is normal.
Is it true that a defective allele always recessive and a normal allele always dominant?
No. The gene that causes Huntington's is caused by an autosomal dominant mutation, and one form of inherited Parkinson's is also caused by an autosomal dominant mutation.
A is a condition of abnormal structure or function of the body and a is a disruption of interference with normal function?
Dominant gene eg as in Huntington's chorea. H represents Huntingtons dominant trait not the normal condition. AA abnormal, Aa abnormal however possibilty of subsequent offspring of Aa and Aa being aa therfore normal!
How are mutations returned to normal in an organism?
Mutations on recessive genes return to normal in an organism
How does hemophilia progress?
Hemophilia is a recessive allele condition. Men can get hemophilia alot easier than women as the allele is found on the XY Chomosome pair. With men. they do not have the extra "tail" on the Y chromosome compared to the XX with a female. If the person has the recessive allele on the X chromosome and this person is male, they will be a hemophiliac as they do not have a 'pair' allele which could be dominant to stop the condition expressing itself. On a female, if there is a recessive (hemophilia) allele on one of the X chromosomes but on the other is a Dominant (normal) allele then she will be a carrier of the faulty gene but will not suffer from the condition herself. If the female have a recessive (faulty) gene on each of the XX chromosomes, then she will be a sufferer of the disease.
What is the probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder?
75%. Explanation: if both parents are carriers than their Gametes would be Dd x Dd, resulting in DD (1/4), Dd (2/4), and dd(1/4), meaning that there is a 25% chance that they will have a child that has the disorder. DD = A normal child that lacks the recessive gene, therefore not a carrier Dd = A normal child that carries the recessive gene dd = A child with the disorder + carries the gene, hence the child's future offspring will carry it as well. Source: Self/Basic Punnet Square
