Unit 7 Test Review

The different forms of a gene

• heredity
• genetics
• gene
• alleles

This trait always shows up in an organism when the allele is present

• dominant allele
• codominance
• probability
• recessive allele

This trait is hidden whenever the dominant allele is present

• dominant allele
• codominance
• recessive allele
• Punnett Square

A chart that shows all the possible combinations of alleles that can result from a genetic cross

• dominant allele
• codominance
• probability
• Punnett Square

An organism's physical appearance or visible traits

• fertilization
• genotype
• phenotype
• homozygous

An organism's genetic makeup, or allele combination

• fertilization
• genotype
• phenotype
• heterozygous

An organism that has two different alleles for a trait (hybrid)

• fertilization
• genotype
• homozygous
• heterozygous

An organism that has two identical alleles for a trait (purebred)

• genotype
• phenotype
• homozygous
• heterozygous

In peas, yellow pod color is dominant to green pod color. Two heterozygous parents are crossed. What are the chances that the offspring will have green pods?

• 25%

• 50%

• 75%

• 100%

In a dihybrid cross, how many boxes does the punnet square need to have?

• 2

• 4

• 8

• 16