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In genes what does BB Bb and bb mean?
In genetics, BB represents a homozygous dominant genotype, where both alleles are dominant. Bb represents a heterozygous genotype, where one allele is dominant and one is recessive. bb represents a homozygous recessive genotype, where both alleles are recessive.
What are dominant and recessive alleles with examples?
Dominant alleles are those that mask the effects of recessive alleles when present. For example, in the case of eye color, the brown eye color allele (B) is dominant over the blue eye color allele (b). If an individual has one copy of the dominant allele (Bb), they will have brown eyes. Recessive alleles are only expressed when an individual has two copies of the recessive allele. For example, in the case of cystic fibrosis, the disease is caused by having two copies of the recessive allele (cc) for the CFTR gene.
A genetic trait which is present but unseen in an individual is called a trait?
A genetic trait which is present but unseen in an individual is called a recessive trait. This means that the individual carries the genetic information for the trait, but it is not expressed phenotypically unless the individual inherits two copies of the recessive allele.
What stands for dominant allele?
A dominant allele is a version of a gene that is expressed when present, masking the effects of a recessive allele when both are present in an individual. It is represented by a capital letter in genetics notation, such as "A" for a dominant allele and "a" for a recessive allele.
How do genes offspring the recessive?
If both parents carry a recessive gene for a trait, there is a chance that their offspring could inherit two recessive alleles, resulting in the expression of the recessive trait. This is known as recessive inheritance, and the likelihood of it happening depends on the genetic makeup of the parents and the specific trait in question.
What genotypic condition must be present for a recessive trait to be visible?
if the ratio had more recessive traits, like if you made a punnit square and you saw that there were more of the recessive traits (BB bb bb bb) then you know that the most common trait is the recessive one "bb" (considered as homozygous recessive ( i think))
Is it possible for 2 homozygous recessive individuals to have a homozygous dominant child?
No, homozygous recessive indivuals MUST have two of the reccessive gene (bb), the possible combinations are bb,bb,bb,bb thus only a recessive trait is possible
What are the differrent forms of a gene?
The 3 forms of a gene (called alleles) are:Dominant-dominant Ex.(BB)Dominant-recessive Ex.(Bb)Recessive-recessive Ex.(bb)
In genes what does BB Bb and bb mean?
In genetics, BB represents a homozygous dominant genotype, where both alleles are dominant. Bb represents a heterozygous genotype, where one allele is dominant and one is recessive. bb represents a homozygous recessive genotype, where both alleles are recessive.
Which allele is recessive and which is dominant in the abbreviation Bb?
In the abbreviation Bb, the "B" allele is dominant and the "b" allele is recessive. Therefore, an individual with the genotype Bb would express the dominant "B" allele.
Can two blue eyed parent have one hundred percent blue eyed children?
Yes .. Blue eye color is a recessive allele. So hence when two homozygous recesive alleles are paired, then the succesive generation will also have homozygous recessive alleles.. Like in this case : Father - bb Mother - bb Children - bb,bb,bb,bb So its 100% homozygous recessive.. :)
What does a punett square show?
The chance of a particular trait being inherited. For each trait there are several alleles, some are dominant and others recessive, for example brown eyes are dominant over blue. The recessive phenotype can only have a genotype with both recessive alleles eg. bb The dominant phenotype can have a genotype with both dominant alleles eg. BB or one of each eg. Bb A punnet square shows the likelihood of a phenotype being inherited from given genotypes, alleles etc... BB and Bb makes BB BB Bb Bb All offspring will have the dominant phenotype (BB or Bb) eg. brown eyes Bb and Bb makes BB Bb Bb bb One in four of the offspring will have the recessive phenotype (bb) eg. blue eyes
What word describes the genotype bb?
Homozygous recessive.
A blue peacock bird has the color blue feathers and is heterozygous (Bb), but the flamingo have pink colored feathers but she is homozygous recessive (bb).They are giving birth to a baby bird. How likely is it that the baby bird gets pink feathers?
To express the recessive gene, the baby bird must have bb. Since the one parent is bb, they will always pass the recessive b. The other parent is Bb, so they have a 50% chance of each. Therefore the child has a 50% chance of Bb and a 50% chance of bb. BB is impossible. Therefore the baby bird has a 50% chance of having pink feathers.
Can a man who has brown eyes and whose both parents have brown eyes produce a blue eyed child if his wife has blue eyes?
yes, if the man with brown eyes had a recessive blue trait. his parents would have to both have the recessive trait as well. the parents with dominate brown (B) with recessive blue (b) eye color traits would create a chart of possible outcomes for their child: B b B bb Bb b Bb bb if the man came out Bb (dominate brown with recessive blue) and had a wife with bb (the only way to have blue eyes is to have two recessive blue traits because if a pair of traits has a Brown then the brwn color will automatically dominate over the blue) the man and the wife will make an eye color chart like this: B b b Bb bb b Bb bb there is a 50/50 chance the child will have blue eyes. if the child has the bb trait then it will have blue eyes.
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 are dominant and recessive alleles with examples?
Dominant alleles are those that mask the effects of recessive alleles when present. For example, in the case of eye color, the brown eye color allele (B) is dominant over the blue eye color allele (b). If an individual has one copy of the dominant allele (Bb), they will have brown eyes. Recessive alleles are only expressed when an individual has two copies of the recessive allele. For example, in the case of cystic fibrosis, the disease is caused by having two copies of the recessive allele (cc) for the CFTR gene.
