Mendelian Genetics

The observable traits of an organism are known as its

• allele
• dominance
• phenotype
• genotype

Tags

NGSS.HS-LS3-3

In pea plants, the trait for tall stems is dominant over the trait for short stems. If two heterozygous tall plants are crossed, what percentage of the offspring would be expected to have the same phenotype as the parents?

• 100%
• 75%
• 50%
• 25%

Tags

NGSS.HS-LS3-3

One of the parents of a child has phenylketonuria (PKU), which is caused by recessive alleles. The other parent does not have the PKU alleles. What is the chance that the couple will have a child with phenylketonuria?

• 0%
• 50%
• 75%
• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

The instruction of one allele covers up the instruction

of the other allele in a homologous pair. Symbolized by a capital letter.

• Recessive Allele

• Dominant Allele

• Heredity

• Trait

Tags

NGSS.HS-LS3-1

The instructions of this allele are covered up by the other allele in a homologous pair. Symbolized by a small letter.

• Homozygous

• Dominant

• Recessive

• Genetics

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

During meiosis and gamete formation, homologous (paired up) alleles split up

• Phenotype

• Law of Segregation

• Genotype

• Dihybrid Cross

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The genetic cross between two parents for one trait:

Example BB x bb

B = dominant for brown

b = recessive for blue

• Incomplete Dominance

• Dihybrid Cross

• Monohybrid Cross

• Iron Cross

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

The Italian monk/scientist who first showed

the principles of genetics

• Watson and Crick

• Linnaeus

• Darwin

• Mendel

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the percentage of homozygous recessive offspring?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Green peas are dominant (G) to yellow peas (g). What is the genotype for a hetereozygous dominant offspring?

• Gg
• gg
• GG

Tags

NGSS.HS-LS3-1