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The phenotype associated with a recessive gene is only expressed when two copies of the gene are present. For example, if a person has both a recessive allele and a dominant allele for CF, the person does not have CF. The person only has CF if he/she has two copies of the recessive allele.
What else can I help you with?
Why can a person have one copy of the CF allele and be perfectly normal?
CF is recessive, and as such, the gene for non-CF is dominant over this gene. The CF gene will only be expressed in the phenotype and as a characteristic if the person has two of the recessive alleles.
Can a baby be born with a CF gene if neither parent has the gene?
No, a baby cannot be born with a CF gene if neither parent has the gene. Cystic fibrosis is an autosomal recessive genetic disorder, meaning both parents must be carriers of the mutated CF gene in order to have a child with the condition.
Is CF X-linked or incomplete dominance?
Cystic fibrosis (CF) is an autosomal recessive disorder, not an X-linked disorder. It means that both copies of the gene responsible for CF need to be mutated in order to develop the disorder. Incomplete dominance refers to a genetic trait where the heterozygous condition results in an intermediate phenotype, which is not the case for CF.
What is the chance that any child will have the disease if two parent who are carriers of cystic fibrosis?
Let's do a Punnit Square. T T T TT TT t Tt Tt T is normal, and the little "t" is the recessive gene (which is being carried by one parent). Since one parent is recessive, you can see that there's a 50% chance that the offspring will have the recessive gene as well. However, note that without any straight "tt" result, there is a 0% chance that the offspring can express the Tay Sachs disorder.
What does recessive mean as it relates to genes?
A recessive gene is one that is only expressed if an individual has two copies of that gene. This means that the trait associated with the recessive gene is not visible unless an individual inherits two copies, one from each parent. If an individual inherits only one copy of a recessive gene, the dominant gene will be expressed instead.
Is cystic fibrosis dominant or recessive?
Cystic Fibrosis is recessive. If you have one CF gene and one non-CF gene, you will be a carrier but not have CF.
Why can a person have one copy of the CF allele and be perfectly normal?
CF is recessive, and as such, the gene for non-CF is dominant over this gene. The CF gene will only be expressed in the phenotype and as a characteristic if the person has two of the recessive alleles.
Can a baby be born with a CF gene if neither parent has the gene?
No, a baby cannot be born with a CF gene if neither parent has the gene. Cystic fibrosis is an autosomal recessive genetic disorder, meaning both parents must be carriers of the mutated CF gene in order to have a child with the condition.
Is CF X-linked or incomplete dominance?
Cystic fibrosis (CF) is an autosomal recessive disorder, not an X-linked disorder. It means that both copies of the gene responsible for CF need to be mutated in order to develop the disorder. Incomplete dominance refers to a genetic trait where the heterozygous condition results in an intermediate phenotype, which is not the case for CF.
What is the chance that any child will have the disease if two parent who are carriers of cystic fibrosis?
Let's do a Punnit Square. T T T TT TT t Tt Tt T is normal, and the little "t" is the recessive gene (which is being carried by one parent). Since one parent is recessive, you can see that there's a 50% chance that the offspring will have the recessive gene as well. However, note that without any straight "tt" result, there is a 0% chance that the offspring can express the Tay Sachs disorder.
What would be the genotype of a person with cystic fibrosis?
The genotype of a person with CF is cc. The genotype of a carrier of a CF mutation is Cc.
What does homo recessive mean?
"Homozygous recessive" means having two copies of a recessive allele for a particular gene. This usually results in the expression of the recessive trait.
What does recessive mean as it relates to genes?
A recessive gene is one that is only expressed if an individual has two copies of that gene. This means that the trait associated with the recessive gene is not visible unless an individual inherits two copies, one from each parent. If an individual inherits only one copy of a recessive gene, the dominant gene will be expressed instead.
Which of these is a gene that does not express itself and is concealed by the presence of another gene of the same trait?
A recessive gene is a gene that does not express itself in the presence of a dominant gene of the same trait. When an individual inherits two recessive genes for a trait, the recessive gene will be expressed.
A gene is recessive when?
Most genes have two copies of each gene with dominant gene "trumping" the recessive one. The gene is recessive because it is said not to do much of anything unless paired with another recessive gene, but if paired with a dominant gene, the dominant gene wins.
Genes that are only seen when paired with a recessive gene?
if u have a recessive gene with a recessive gene then u can see the recessive gene but if you have a dominant gene with a recessive gene you can only see the dominant gene hope that helps:)
What does it mean when a disease is recessive?
You don't have it but have the gene and are a carrier and could pass it on.
