GREGOR MENDEL AND GENETICS

Front

What is the definition of homozygous?

Back

Homozygous refers to having two identical alleles for a particular gene.

Front

How many pairs of chromosomes do humans have?

Back

Humans have 23 pairs of chromosomes, totaling 46 chromosomes.

Front

What does the term 'dominant' mean in genetics?

Back

A dominant allele is one that expresses its trait even when only one copy is present.

Front

What does the term 'recessive' mean in genetics?

Back

A recessive allele is one that only expresses its trait when two copies are present.

Front

What is a phenotype?

Back

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

Front

What is a genotype?

Back

A genotype is the genetic constitution of an individual, specifically the alleles present for a particular gene.

Front

What is the expected phenotype ratio from a monohybrid cross of Aa x Aa?

Back

The expected phenotype ratio is 3:1 (3 dominant: 1 recessive).

Front

What is the expected genotype ratio from a monohybrid cross of Aa x Aa?

Back

The expected genotype ratio is 1:2:1 (1 homozygous dominant: 2 heterozygous: 1 homozygous recessive).

Front

What is the purpose of a Punnett square?

Back

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

Front

What is an allele?

Back

An allele is a variant form of a gene that can produce different traits.