DNA/Genetics Basics Quiz

DNA stands for:

• Double Nucleic Acid

• Denatured Acid

• Deoxyribonucleic Acid

• Doubleoxyribo Acid

The order of the bases along a gene in a DNA molecule determines the order in which

• sugars are put together to form a carbohydrate

• phosphates are arranged in DNA

• amino acids are put together to form a protein

• chromosomes are arranged in the nucleus

DNA is found generally inside the ________________ of a cell.

• nucleus

• mitochondria

• traits

• lysosomes

Brown eye color would be an example of which of the following?

• genotype

• phenotype

• DNA

• nucleus

A segment of DNA that codes for a specific trait is known as a

• traits

• phenotype

• genotype

• gene

A heterozygous organism has

• three different gene alleles for a trait

• only one gene allele for a trait

• two identical gene alleles for a trait

• two different gene alleles for a trait

Probability is

• Always expressed as a ratio

• A 50% chance that an event will occur

• The mathematical chance an event will occur

• A 3:1 chance that an event will occur

Factors that control traits are called

• Genes

• Purebreds

• Recessives

• Parents

What does the notation TT mean to a geneticist (a gene scientist)?

• Two dominant gene alleles

• Two recessive gene alleles

• At least one dominant gene allele

• One dominant gene allele and one recessive gene allele

What does the notation Tt mean to a geneticist

• Two dominant gene alleles

• Two recessive gene alleles

• Its pure bred for a trait

• One dominant gene allele and one recessive gene allele