Mendelian Genetics

Front

What is Mendelian Genetics?

Back

Mendelian Genetics is the study of how traits are inherited through generations, based on the principles established by Gregor Mendel.

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses (e.g., Aa, TT, tt).

Front

What is a phenotype?

Back

A phenotype is the physical appearance or observable characteristics of an organism, determined by its genotype.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., TT or tt).

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Tt).

Front

What is a dominant trait?

Back

A dominant trait is an allele that expresses its phenotype even when only one copy is present (e.g., R in Rr).

Front

What is a recessive trait?

Back

A recessive trait is an allele that only expresses its phenotype when two copies are present (e.g., rr).

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles.

Front

What is the probability of obtaining a homozygous recessive offspring from a cross of two heterozygous parents (Tt x Tt)?

Back

The probability is 25%.

Front

What is the expected phenotypic ratio for a dihybrid cross (RrYy x RrYy)?

Back

The expected phenotypic ratio is 9:3:3:1.