mendelian & nonmendelian genetics & punnett squares 4/23-27

In pea plants, the trait of height obeys simple Mendelian dominance; the tall allele codes the dominant phenotype, while the short allele codes the recessive phenotype. What key would demonstrate this?

• Tall = T

  Short = S

• Tall = T

  Short = t

• Tall = t

  Short = T

• Tall = TT

  Short = tt

Tags

NGSS.HS-LS3-1

Identify the homozygous dominant genotype:

• FF
• Ff
• ff

Dominant alleles are represented by a:

• Male gene
• lowercase letter
• recessive trait
• capital letter

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes

IIf a trait exhibits simple Mendelian dominance, in a heterozygous genotype, the ___________ allele completely controls the phenotype. Mendel concluded this by observing the F1 offspring born to parents of true breeding parents which had opposing versions of the same trait.

• recessive

• dominant

• lower case letter

• both

Tags

NGSS.HS-LS3-1

The physical description of the version of a trait seen in a particular individual.

• Genotype

• Phenotype

• Homozygous

• Heterozygous

Tags

NGSS.HS-LS3-1

T - tall and t = short

In the punnett square below, what belongs in the missing square

• tt

• Tt

• Bb

• TT

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

B = brown eyes (allele B codes functional, expressed pigment"

b = blue eyes (allele b codes nonfunctional unexpressed --no pigment added)

Assume "simple dominance" --that is, assume that B completely "masks or hides" presence of b.

One brother has genotype BB and the other brother has genotype Bb.

Which statement is true about these two brothers?

• They have same phenotype and genotype

• They have different phenotypes and genotypes

• They have same phenotype, but different genotypes

• They have different phenotypes, but the same genotype

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The genotype Aa is called . . .

• Homozygous recessive or true-breeding recessive

• Hybrid or heterozygous

• Purebred or truebreeding dominant

• Homozygous dominant

Which of the following would be a phenotype?

• Aa

• red hair color versus brown hair color

• heterozygous

• DNA

• the trait hair color