Genetics

Front

What are genotypes?

Back

Genotypes are the genetic makeup of an organism, represented by the combination of alleles (e.g., TT, Tt, tt).

Front

What is the probability of having a boy or girl in a couple's next child?

Back

The probability of having a boy or girl is 50% for each child, regardless of previous children.

Front

Define 'trait' in genetics.

Back

A trait is a physical characteristic that can be passed from parent to offspring, such as eye color or height.

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 the dominant allele?

Back

The dominant allele is the one that expresses its trait even when only one copy is present (e.g., Y in YY or Yy).

Front

What is the recessive allele?

Back

The recessive allele is the one that only expresses its trait when two copies are present (e.g., yy).

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the genetic outcomes of a cross between two organisms.

Front

If a homozygous round seeded plant (RR) is crossed with a homozygous wrinkled seeded plant (rr), what will be the genotype of the offspring?

Back

All offspring will be heterozygous (Rr) and will display the dominant round seed trait.

Front

What is the expected phenotypic ratio of a monohybrid cross?

Back

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