Genetics Test25

In humans, hair type shows incomplete dominance. Straight hair = SS, Curvy hair = CC, and Wavy hair is a blend of those two alleles = SC. Cross a female who has curvy hair with a straight haired male. What type of hair will their child have?

• 50% Curly: 50% Straight: 0% Wavy
• 25% Curly: 50% Straight: 25% Wavy
• 0% Curly: 0% Straight: 100% Wavy
• 100% Curly: 0% Straight: 0% Wavy

What is the figure below called? It is a picture of the chromosomes of an organism.

• Karyotype
• Pedigree
• DNA Fingerprinting
• Gel Electrophoresis

What is the figure below called? It is a chart the illustrates the passing of a trait in a family through the generations.

• Pedigree
• Karyotype
• Gel Electrophoresis
• PCR

Organisms that have two identical alleles for a particular trait are said to be

• hybrid.
• homozygous.
• heterozygous.
• dominant.

Yellow (g) pod color is recessive and green (G) pod color is dominant. If you cross a yellow pod plant with a green heterozygous pod plant, what is the percentage of having the green pod plant?

• 25%
• 50%
• 75%
• 100%

What is the genotypic ratio of this Punnett square? A=Axial flower position and a=Terminal flower position

• 25% Axial flower postion: 75% Terminal flower position
• 50%Aa:50%AA:23%aa
• 25%aa:50%Aa:25%AA
• 75% Axial flower position: 25% Terminal flower position

Situations in which one allele for a gene is not completely dominant over another allele for that gene (blending) is called___________________________

• multiple alleles.
• incomplete dominance.
• polygenic inheritance.
• multiple genes.

What is the phenotypic ratio of this Punnett square? A=Axial flower position and a=Terminal flower position

• 25% Axial flower postion:75% Terminal flower position
• 50%Aa:50%AA:25%aa
• 25%aa:50%Aa:25%AA
• 75% Axial flower position: 25% Terminal flower position

The is a situation in which both alleles contribute to the phenotype of an organism. (both alleles are dominant and are expressed)

• incomplete dominance
• codominance
• polygenic traits
• multiple alleles

This is a situation in which a traits is produced by the interaction of several genes. (example skin color)

• incomplete dominance
• codominance
• polygenic traits
• multiple alleles