Category Gene & Genetics

What is a Pedigree?

A pedigree is a chart or diagram that shows the relationships between members of a family of several generations and can be used to study the inheritance of genetic traits or diseases. A pedigree typically includes information about family members,…

What is a Punnett Square?

A Punnett square is a graphical representation used in genetics to predict the possible genotypes of offspring resulting from a cross between two parent organisms. It is named after Reginald Punnett, who developed the technique in the early 20th century.…

What is Reciprocal Cross?

A reciprocal cross is an experimental technique used in genetics to determine whether the inheritance of a particular trait is affected by the sex of the parent carrying the gene. In a reciprocal cross, two-parent organisms are crossed in two…

What is the P1 generation?

The P1 (or P) generation, or parental generation, refers to the first set of individuals in a genetic cross that are mated to produce offspring. In a classical Mendelian genetics experiment, the P1 generation is usually comprised of two individuals…

What is a Test cross?

A test cross is a genetic cross between an individual with a dominant phenotype (but an unknown genotype) and a homozygous recessive individual. The is to determine the genotype of the dominant individual. The offspring of a testcross is used…