Pedigrees

Front

What is a pedigree?

Back

A pedigree is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors.

Front

How many generations are typically shown in a pedigree chart?

Back

A pedigree chart can show multiple generations, often 3 to 4 generations.

Front

What does 'T' represent in genetics?

Back

In genetics, 'T' typically represents a dominant trait, such as tallness in plants.

Front

What does 't' represent in genetics?

Back

In genetics, 't' typically represents a recessive trait, such as shortness in plants.

Front

What is a Punnett square used for?

Back

A Punnett square is used to predict the genotypes of offspring from a genetic cross.

Front

What does 'aa' represent in terms of dominance?

Back

The genotype 'aa' represents a recessive trait.

Front

If a mother and father have 4 children, how many possible combinations of boys and girls can they have?

Back

They can have various combinations, such as 4 boys, 3 boys and 1 girl, 2 boys and 2 girls, 1 boy and 3 girls, or 4 girls.

Front

What is the significance of a square in a pedigree chart?

Back

A square represents a male individual in a pedigree chart.

Front

What is the significance of a circle in a pedigree chart?

Back

A circle represents a female individual in a pedigree chart.

Front

How can you determine if a trait is dominant or recessive from a pedigree?

Back

If the trait appears in every generation, it is likely dominant; if it skips generations, it is likely recessive.