Sickle cell trait carries a lower risk of serious malarial disease, without the signs and symptoms of sickle-cell anemia.
They do not carry the sickle cell allele, a. Individuals that are heterozygous have the advantage of being more resistant to malaria than homozygous dominant individuals, but are not affected by the disease.
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.
there would be a 100% chance of it being heterozygous (Pp)
The notation Tt represents a heterozygous genotype for the trait of being tall, where T is the dominant allele for tallness and t is the recessive allele for shortness. This means the individual will exhibit the tall trait because the dominant allele is expressed.
The notation Rr indicates that an individual has one dominant allele (R) and one recessive allele (r) for a specific gene. This is known as being heterozygous for that gene. The dominant allele will usually determine the individual's phenotype.
In the case of selfing an Rr individual - which is heterozygous - you would expect 50% of the offspring to be heterozygous (Rr), as each parent contributes one allele to the offspring. Each allele has a 50% chance of being passed on.
If you are heterozygous this means you carry both a dominant and recessive allele. if you are heterozygous for a recessive trait then you will have a dominant and recessive allele. example: let T represent tall and t represent short. a person with heterozygous for a recessive trait will have 'Tt'.
The term for an individual with a dominant and a recessive allele for a trait is "heterozygous." This means they have two different alleles for a specific gene, with one being dominant and the other recessive.
sickle cell anemia is caused by a recessive allele. so for it to affect someone, it means that the person must have received both recessive alleles from their parents. Being a carrier means that you have the recessive allele from one of your parents, but you have a normal dominant allele from the other parent, that means you are not affected by it but you are carrying it.
Heterozygous cells contain two different alleles for a gene, typically with one allele being dominant and the other recessive. This means that the dominant allele will be expressed in the phenotype, while the recessive allele is present but not expressed.
yellow peas
The offspring will all inherit one copy of the dominant allele (from the heterozygous parent) and one copy of the recessive allele (from the homozygous recessive parent). This results in all offspring being heterozygous for the trait.