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Alleles are different versions of a gene that arise due to variations in the DNA sequence. They can be dominant or recessive, influencing traits expressed in an organism. For example, an allele for brown eyes may be dominant over an allele for blue eyes. In a diploid organism, each individual carries two alleles for each gene, one inherited from each parent.
What else can I help you with?
When the alleles of a gene pair are different they are said to be what?
They are considered to be heterozygous not heterosexual!
Are organisms with alleles BB recessive or dominant?
Organisms with alleles BB are considered homozygous dominant. This means that the dominant allele (B) is expressed in the phenotype. Dominant alleles mask the effects of recessive alleles in heterozygous individuals.
Which of the genotypes in 1 would be considered purebred?
Purebred genotypes are those that are homozygous for a specific trait, meaning they have identical alleles for that trait. For instance, if the genotypes include AA or aa, these would be considered purebred, as both alleles are the same. In contrast, heterozygous genotypes, like Aa, are not purebred because they contain different alleles.
Pairs of alleles ( genes ) that are the same i.e. GG nn are called what?
Pairs of alleles that are the same, such as GG or nn, are referred to as "homozygous." In these cases, both alleles at a particular gene locus are identical, which can influence the expression of traits in an organism. If the alleles are different, such as Gg or Nn, the organism is considered "heterozygous."
Two different forms of the same gene are called?
Alleles
When the alleles of a gene pair are different they are said to be what?
They are considered to be heterozygous not heterosexual!
Are organisms with alleles BB recessive or dominant?
Organisms with alleles BB are considered homozygous dominant. This means that the dominant allele (B) is expressed in the phenotype. Dominant alleles mask the effects of recessive alleles in heterozygous individuals.
What is gene pair consists of two dominant alleles or two recessive alleles?
A gene pair that consists of 2 dominant or 2 recessive alleles is considered homozygous dominant or homozygous recessive.
Which of the genotypes in 1 would be considered purebred?
Purebred genotypes are those that are homozygous for a specific trait, meaning they have identical alleles for that trait. For instance, if the genotypes include AA or aa, these would be considered purebred, as both alleles are the same. In contrast, heterozygous genotypes, like Aa, are not purebred because they contain different alleles.
Pairs of alleles ( genes ) that are the same i.e. GG nn are called what?
Pairs of alleles that are the same, such as GG or nn, are referred to as "homozygous." In these cases, both alleles at a particular gene locus are identical, which can influence the expression of traits in an organism. If the alleles are different, such as Gg or Nn, the organism is considered "heterozygous."
What role do alleles play in the determination of characteristics?
Alleles can be considered as alternative (or "rival") forms of the same general trait. For instance, if we consider eye-color as the product of a single gene (which it isn't), then there exist "blue", "brown", "green" and "grey" alleles for that gene. The eye-color a person ultimately gets is determined by what alleles are inherited by that person from its parents, and how those alleles interact (eg. whether either or both alleles are dominant or recessive, etc).
Can a child be O positive if father is b positive and mother is a negative?
Yes. Blood type is determined by two alleles. A person with alleles AA or AO is considered type A, and a person with alleles BB or BO is considered type B. If the parents are AO and BO, they could both pass the O on to their child who would then be OO, type O.
Two different forms of the same gene are called?
Alleles
Phenotype of universal donor?
A patient with O negative blood is considered the universal donor. This phenotype is associated with just one genotype; both alleles must be "O" and both alleles must be negative.
What does it mean if an organism is homozygous?
An organism is considered homozygous when it has two identical alleles for a specific gene, one inherited from each parent. This means that both alleles express the same trait, whether dominant or recessive. For example, if an organism has two alleles for blue eyes (bb), it is homozygous for that trait. In contrast, heterozygous organisms possess two different alleles for a gene.
What are contrasting forms of genes called?
Alleles
What type of alleles mask recessive alleles?
Dominant alleles :-)
