Genetics Test25

Front

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?

Back

50% Curly: 50% Straight: 0% Wavy

Front

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

Back

Karyotype

Front

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

Back

Pedigree

Front

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

Back

homozygous.

Front

If you cross a yellow pod plant (recessive) with a green heterozygous pod plant (dominant), what is the percentage of having the green pod plant?

Back

50%

Front

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

Back

25% aa: 50% Aa: 25% AA

Front

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

Back

incomplete dominance.

Front

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

Back

75% Axial flower position: 25% Terminal flower position

Front

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

Back

codominance

Front

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

Back

polygenic traits