Mendelian Genetics Review

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences.

Front

What is the genotype of a homozygous dominant organism?

Back

The genotype of a homozygous dominant organism is represented as 'AA'.

Front

What is the result of crossing two homozygous plants (RRYY x rryy) in terms of seed shape and color?

Back

100% of the offspring will have round (R) and yellow (Y) seeds.

Front

Who is known as the father of genetics?

Back

Gregor Mendel is known as the father of genetics for his work on inheritance patterns in pea plants.

Front

What does the term 'dominant trait' mean?

Back

A dominant trait is a genetic trait that is expressed in the phenotype even when only one copy of the allele is present.

Front

What is the difference between homozygous and heterozygous genotypes?

Back

Homozygous genotypes have two identical alleles for a trait (e.g., AA or aa), while heterozygous genotypes have two different alleles (e.g., Aa).

Front

What is a Punnett square used for?

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 does 'RR' represent in genetics?

Back

'RR' represents a homozygous dominant genotype for a trait.

Front

What is the significance of Mendel's experiments with pea plants?

Back

Mendel's experiments established the basic principles of heredity, including the laws of segregation and independent assortment.

Front

What is the expected phenotypic ratio in a monohybrid cross?

Back

The expected phenotypic ratio in a monohybrid cross is typically 3:1 for dominant to recessive traits.