Genetics Test25

Which term describes the physical characteristics of an organism.

• genotype
• phenotype
• Punnett square
• allele

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

• 25%
• 50%
• 75%
• 100%

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.

Variation in eye and human skin color are examples of ___________________. (many genes affect the outcome of the trait)

• incomplete dominance.
• codominance.
• polygenic traits.
• multiple alleles.

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

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

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

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

What is the genotypic ratio of a heterozygous tall pea plant crossed with a heterozygous tall pea plant. T-Tall t-Short

• 50% Tall: 50% Short
• 75% Tall: 25%Short
• 25%TT: 50%Tt: 25%tt
• 50%Tt: 50%tt

What is the phenotypic ratio of a heterozygous round pea plant crossed with a wrinkled pea plant. R-Round r-wrinkled

• 50% Round: 50% Winkled
• 75% Round: 25%wrinkled
• 25%RR: 50% Rr: 25%rr
• 50%Rr: 50%rr

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

• Karyotype
• Pedigree
• DNA Fingerprinting
• Gel Electrophoresis