If both parents have the gene, the chances are 25% of having a child with Cystic Fibrosis. The male and females x genes are affected by it and only half of it. So when the parents mate and they are going to have a baby, the chances are 25%
inductive reasoning
Inductive reasoning is used to seek strong evidence for the truth of the conclusion. Looking at different pictures side by side then trying to figure out the pattern is inductive reasoning.
Deductive reasoning uses logical principles to derive a specific conclusion from general premises. It involves moving from a pattern that is always true to a specific conclusion that must be true if the premises are true. This type of reasoning is often associated with mathematical and scientific methods of inquiry.
Inheritance - Autosomal recessive, requires mutations on both alleles - A single gene on chromosome 7, which encodes for the cystic fibrosis transmembrane conductance regulator - There are over 1000 different mutations for this gene - The most common is Delta F508, which makes up 67% of all mutations in the Caucasian population - Caucasians most effected
The use of a specific observation to reach a general conclusion. (APEX)
Inductive reasoning derives a likely conclusion based on a pattern or trend observed in specific instances. It moves from specific observations to generalizations, assuming that what holds true for the observed cases will likely hold true for similar cases in the future.
The inheritance pattern of the BRCA1 gene is dominant.
Gregor Johann Mendel is credited with discovering the pattern of genetic inheritance
The recessive nature of the cystic fibrosis allele means that an individual must inherit two copies of the allele (one from each parent) to express the condition. If a person has only one copy of the cystic fibrosis allele and one normal allele, they will be a carrier but will not exhibit symptoms of the disease. This inheritance pattern affects how the disease is passed on in families, with carriers having a 25% chance of having an affected child if both parents are carriers.
Cystic fibrosis is an autosomal recessive disorder caused by mutations in the CFTR (cystic fibrosis transmembrane conductance regulator) gene. Heterozygous carriers (those who have inherited only one copy of the altered gene) are asymptomatic (do not experience symptoms). Two of these altered genes must be present for CF to appear. This means that if both parents are CF carriers, their offspring will express CF symptoms only if the child inherits one defective copy of the CFTR gene from each parent.
Types of dominance, multiple alleles, sex linked inheritance, polygenic inheritance and maternal inheritance.
pedigree