10BD 11-1: Mendelian Genetics

How many alleles do you inherit from EACH parent for a specific trait?

• 1

• 2

The study of heredity is called ____.

• genetics

• biology

• chemistry

• herediology

Which of the following best describes the difference between genotype and phenotype?

• Genotype refers to observable physical traits, while phenotype refers to the genetic makeup of an organism.

• Genotype refers to the genetic makeup of an organism, while phenotype refers to observable physical traits.

• Genotype and phenotype both describe the physical appearance of an organism.

• Genotype and phenotype both describe the DNA sequence of an organism.

A mouse has brown fur and is heterozygous for fur color. Which is likely its genotype?

• Bb

• BB

• brown fur color

• BT

Which of the following best describes the difference between homozygous and heterozygous genotypes?

• A homozygous genotype has two identical alleles for a trait, while a heterozygous genotype has two different alleles for a trait.

• A heterozygous genotype has two identical alleles for a trait, while a homozygous genotype has two different alleles for a trait.

• Homozygous and heterozygous genotypes both contain only dominant alleles.

• Homozygous and heterozygous genotypes both contain only recessive alleles.

What was Gregor Mendel's greatest contribution to genetics?

• He determined that genes are pass on from parents to offspring.

• He devised the Punnett square as a way for modeling how alleles combine.

• He was able to apply his laws to entire populations.

• He was able to describe the frequency of alleles in a population.

Segments of DNA that code for traits are called ____.

• alleles

• proteins

• genes

Which of the following is a PHENOTYPE for flower color in pea plants?

• PP

• purple

• Pp

• pp

Which combination of alleles would support that the organism has the dominant form of the expressed trait?

• bb

• Bb

• black fur

• white fur

Which statement below describes RECESSIVE alleles?

• expressed when at least one is present

• only expressed when 2 are present