Genes, DNA and Chromosomes

How many pairs of chromosomes are found in human cells?

• 23

• 46

• 92

• Thousands

A small section of DNA that contains the information for a trait.

• Chromosome

• Gene

• Karyotype

• Phenotype

Different versions of a gene are called _______

The complete set of DNA that an organism inherits from its biological parents.

• Chromosomes

• Phenotype

• Allele

• Genome

Which is an example of a heterozygous genotype?

• TT

• Ht

• Hh

• tt

Rabbits have a gene that determines their ear size. Large ears (E) are the dominant allele, short ears (e) are recessive. A rabbit is homozygous dominant for the ear trait. What is its phenotype?

• EE

• ee

• Long Ears

• Short Ears

What two factors determine an organism's phenotype?

Which choice is arranged from largest to smallest?

• Cell - Gene - DNA - Nucleus - Chromosome

• Nucleus - Cell - DNA - Chromosome - Gene

• Cell - Nucleus - Chromosome - DNA - Gene

• Cell - Nucleus - DNA - Chromosome - Gene

A dragonfly inherits two different alleles for wing shape. The dragon fly is

• Homozygous dominant

• Heterozygous dominant

• Homozygous recessive

• Heterozygous

DNA carries a code that tells cells how to make

• proteins

• energy

• genes

• nuclei