Inheritance

What is a genotype?

• The dominant and recessive alleles for a given gene
• The genotype of an offspring
• The result of inheritance
• The set of alleles present in the DNA of an individual organism

Which of the following is an example of complete dominance in inheritance?

• When an organism's phenotype is determined by both genotype and environment
• When an organism's phenotype is determined by the presence of one dominant allele
• When an organism's phenotype is determined by the presence of two dominant alleles
• When an organism's phenotype is determined by a combination of dominant and recessive alleles

What is the difference between monogenic and polygenic traits?

• Monogenic traits have continuous variation, while polygenic traits have discrete variation
• Monogenic traits are determined by multiple genes, while polygenic traits are determined by one set of genes
• Monogenic traits have discrete variation, while polygenic traits have continuous variation
• Monogenic traits are determined by one set of genes, while polygenic traits are determined by multiple genes

How many alleles does each individual usually have for each gene?

• Two
• One
• Three
• Four

What are phenotypes that are determined by one set of genes called?

• Discrete variation
• Alleles
• Monogenic traits
• Polygenic traits

What are dominant and recessive alleles?

• Alleles that determine an organism's environment
• Alleles that determine an organism's phenotype
• Alleles that are only expressed in an organism's genotype
• Alleles that are always expressed in an organism's phenotype

What is the relationship between alleles and phenotypes in incomplete dominance?

• Alleles determine the exact phenotype
• Alleles determine the dominant phenotype
• Alleles contribute to an intermediate phenotype
• Alleles have no effect on phenotypes

What are phenotypes that are determined by the interactions of multiple genes called?

• Monogenic traits
• Alleles
• Polygenic traits
• Discrete variation

What is co-dominance?

• When both alleles are expressed fully in the phenotype
• When one allele is completely recessive to the other
• When one allele is completely dominant over the other
• When both alleles are partially expressed in the phenotype

What happens when flowers with a red phenotype are crossed with flowers with a white phenotype?

• The resulting flowers will be a mix of red and white
• The resulting flowers will be red
• The resulting flowers will be white
• The resulting flowers will be pink