Unit 6 Quiz Review

For a certain plant, purple flowers (allele: P) are dominant, and white flowers (allele: p) are recessive.  A purple plant carrying both types of alleles is crossed with a true-breeding white plant.  What are the possible genotypes (allele pairs) of the offspring? (SC.912.L.16.1)

• pp only

• PP, Pp, and pp

• Pp only

• Pp and pp only

Tags

NGSS.HS-LS3-2

The observed trait that appears in an organism as a result of its genetic make up is called the organism's (SC.912.L.16.2)

• Allele

• Phenotype

• Genotype

• Karyotype

Tags

NGSS.HS-LS3-1

The allele that is only expressed when two copies are present (SC.912.L.16.2)

• Genetics

• Dominant

• Crossing Over

• Recessive

The allele that is expressed when 2 different alleles are present or 2 dominant alleles are present (SC.912.L.16.2)

• Genetics

• Dominant

• Recessive

• Crossing OVer

Genetically uniform or genetically the same (SC.912.L.16.2)

• Pedigree

• Purebred

• Dominant

• Recessive

Tags

NGSS.HS-LS3-1

In Bengal tigers, the allele for an orange cat is dominant to the allele for a white coat. If a homozygous recessive tiger is crossed with a tiger heterozygous for coat color, what is the percentage probability that one of the offspring will be orange? (SC.912.L.16.1)

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Hitchhiker's thumb (H) is dominant to no hitchhiker's thumb (h). A woman who does not have hitchhiker's thumb marries a man who is heterozygous for the hitchhiker's thumb. What is the probable genotypic ratio of their children? (SC.912.L.16.1)

• 0% Hh; 100% hh

• 75% Hh; 25% hh

• 50% Hh; 50% hh

• 100% Hh; 0% hh

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A population of crabs living on a sandy beach exhibits three colors: dark brown, light brown, and speckled.  The genotypes for these colors are BB for dark brown, bb for light brown, and Bb for speckled.  If a dark brown crab were crossed with a light brown crab, what would be the probable phenotypic ratio of their offspring? (SC.912.L.16.1)

• all speckled

• 3 dark brown: 1 light brown

• all dark dark brown

• 1 dark brown: 2 speckled: 1 light brown

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In humans, freckles are dominant and a lack of freckles is recessive. What is the probability that a child would have freckles if one parent is homozygous for freckles and one parent does NOT have freckles? (SC.912.L.16.1)

• 0%

• 25%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3