Unit 3: Genetics & Heredity Review

Which characteristic cannot be inherited?

• the ability to win a soccer game

• length of fur in dogs

• shape of ears in pigs

• height of stem in a sunflower plant

Which statement correctly describes the mechanism of inheritance?

• Alleles from heterozygous chromosomes determine traits.

• Chromosomes on homozygous genes determine traits.

• Alleles on homologous chromosomes determine traits.

• Homologous chromosomes determine the genes for a trait.

If a long tail is a dominant characteristic, in which case is the characteristic of a long tail definitely expressed?

• when both parents have a long tail

• when at least one parent has a long tail

• when neither allele contains instructions for a long tail

• when at least one allele contains instructions for a long tail

What did Mendel's cross-pollination of pea plants prove?

• Each parent only passes on one-half of its hereditary factors to each offspring.

• It takes four generations of offspring to identify the parents' factors.

• There is no such thing as a true-breeding plant; they all have hidden factors.

• Inherited factors combine in offspring to create entirely new characteristics.

The lion-tailed macaque is a species of Old World monkey. Which group will the lion-tailed macaque reproduce with?

• other macaques

• any Old World monkeys

• other lion-tailed macaques

• any monkey species

What determines the similarities in anatomical features among organisms?

• geographical location

• weather and climate

• shared habitat

• genes and chromosomes

What is the relationship among chromosomes, genes, and DNA ?

• DNA reads the nucleotide sequences found in genes. Genes are located on tightly wound structures called chromosomes.

• Genes are made up of tightly wound strands of DNA . Chromosomes are made up of one or more genes.

• Chromosomes are sections of DNA found on genes. Genes are long, tightly would strands of DNA .

• Genes read the DNA code found on chromosomes. Chromosomes are long tightly wound strands of DNA .

What is true of the genetic makeup of all body cells in the human body except for sex cells?

• It is different based on the cell type.

• It is the same no matter what the cell type.

• It is random even within the same cell type.

• It is used to sort cells into organs based on chromosomal differences.

A botanist has the juiciest tomatoes in his backyard garden. What is true about these tomatoes?

• They are saltier, so they absorb more water from their surroundings, making them juicier.

• They are grown by someone with a green thumb, so they grow better.

• They are grown from seeds that come from plants that produce juicier fruit.

• They are watered more often than tomatoes grown in other gardens.

Which headline would be an example of genetic engineering?

• Mrs. O'Hara Gives Birth to Fourth Redhead

• Farmer Brown's Pigs: Best Quality Ham for the Money

• Liver Cells Improves Clotting Time in Hemophilia Patients

• Bacteria Make Human Insulin