Mendelian Genetics

What is an allele?

• Different versions of the same gene

• A section of DNA with instructions for making a protein

• A matching pair of chromosomes

• A single set of chromosomes for each gamete

Which of the following was NOT a control Mendel used in his experiments?

• Used only purebred pea plants

• Observed "either-or" traits

• Used pea plants that self-pollinate

• Only crossed heterozygous pea plants

Tags

NGSS.MS-LS4-4

According to the Law of Dominance, a ____________ allele will always express itself over a _____________ allele

• Dominant, Recessive

• Recessive, Dominant

• Heterozygous, Homozygous

• Homozygous, Heterozygous

When will a recessive trait be expressed?

• When the dominant allele is NOT present

• When the dominant allele is present

• In a heterozygous genotype

• In a homozygous dominant genotype

The actual alleles (letters) inherited by an organism are the...

• Genotype

• Phenotype

• Chromosomes

• Genes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What does the phenotype refer to?

• The physical traits of an organism

• The alleles an organism inherits

• The letters of an organism in a Punnett Square

• The chromosomes of an organism

An organism with genotype AA is...

• Homozygous Dominant

• Heterozygous

• Homozygous Recessive

• Heterozygous Dominant

Which of the following is a heterozygous genotype?

• Dd

• DD

• dd

• DDdd

Which of Mendel's laws states that each gamete will only receive one (1) chromosome from each pair during meiosis?

• Law of Dominance

• Law of Independent Assortment

• Law of Segregation

• Law of Phenotypes

According to the Law of Independent Assortment...

• The alleles for one trait determine the inheritance of another trait

• Certain traits are inherited together

• The arrangement of chromosomes for one trait can affect the arrangement of chromosomes for another trait

• Traits are inherited independently of one another