Genetics Quiz

What is an allele?

• A type of cell

• A gene

• A protein

• A chromosome

What does homozygous mean?

• One dominant and one recessive allele

• Two dominant or two recessive alleles

• No alleles

• Three alleles

What is the genotype for a heterozygous individual?

• AA

• aa

• Aa

• AAA

How many letters must a genotype have?

• 1

• 2

• 3

• 4

What is the ratio of traits formula?

• Number of cells / Total number of proteins

• Number of possible combinations / Total number of possible (4)

• Number of chromosomes / Total number of genes

• Number of alleles / Total number of traits

Which of the following is a dominant allele combination?

• aa

• Aa

• AA

• aA

Which of the following is a recessive allele combination?

• AA

• Aa

• aA

• aa

Punnett Square showing combinations of alleles from two parents

• A diagram showing the genetic cross between two organisms

• A chart used to track the inheritance of traits over generations

• A tool used to predict the probability of certain traits in offspring

• A method for determining the sequence of DNA bases

What should each letter of the genotype get in a Punnett Square?

• Its own box

• Its own row or column

• Its own color

• Its own shape

What should you do with capital and lowercase letters in a Punnett Square?

• Mix them up

• Keep capital letters capital and lowercase letters lowercase

• Change them all to lowercase

• Change them all to capital