Genetics Quiz

If there are 50 chromosomes in each body cell of an organism, what is the total number of chromosomes normally present in a gamete produced that organism?

• 50

• 100

• 23

• 25

Which of the following is a homozygous dominant genotype?

• BB

• Bb

• bb

What is it called when chromosomes fail to separate during meiosis, resulting in gametes with too few or too many chromosomes?

• crossing over

• nondisjunction

• polyplody

• gene mutation

Mutations are important for the evolution of new species

• True

• False

In a punnet square, what do each of the boxes represent?

• the genotype that any of the children could inherit

• the genotype that 1 out of their four kids will inherit

• the genotypes of the mother

If T represents tall plants and t represents short plants, what percentage of the offspring shown will be tall?

• 0%

• 25%

• 50%

• 100%

Meiosis results in ....

• 4 gametes that are genetically unique

• 2 gametes that genetically identical

What is one thing that produces genetic variation/diversity?

• mutations

• phenotypes

• endoplasmic reticulum

What is the relationship between DNA, cells, and proteins?

• Cells contain DNA and that DNA controls protein production

• Proteins make DNA and cells make protein

• DNA is made of cells and proteins

A mutation is likely to be passed onto the offspring if...

• it is a favorable mutation/variation

• it is an unfavorable mutation/variation