Mastery of Mendelian Genetics and Monohybrid Crosses

Front

What is the probability of obtaining a pea plant with tall stems (dominant trait) in a monohybrid cross between two heterozygous pea plants (Tt)?

Back

75%

Tags

NGSS.HS-LS4-3

Front

What term describes the physical appearance of an organism as a result of its genotype?

Back

Phenotype

Tags

NGSS.MS-LS3-1

NGSS.MS-LS4-2

NGSS.MS-LS4-4

Front

What does Gregor Mendel's law of segregation state?

Back

Each individual has two alleles for each gene, which segregate during meiosis, resulting in gametes carrying only one allele for a trait.

Tags

NGSS.HS-LS3-2

Front

What is the term for the genetic makeup of an organism?

Back

Genotype

Front

What is the expected phenotypic ratio from a monohybrid cross between two heterozygous individuals (Tt x Tt) for a trait with complete dominance?

Back

3:1

Front

Define a monohybrid cross.

Back

A genetic cross between individuals that differ in one trait, typically involving one pair of contrasting traits.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even in the presence of a recessive allele, while recessive alleles only express their trait when two copies are present.

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

How do you determine the genotype of an organism exhibiting a dominant phenotype?

Back

You can perform a test cross with a homozygous recessive individual to determine if the organism is homozygous or heterozygous.

Front

What is a Punnett square and how is it used?

Back

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

Tags

NGSS.HS-LS4-3