Re-Take Practice: Genetics and Evolution

Why do we use Punnett squares in genetics?

• Punnett squares tell us what the parents look like

• Punnett squares tell us the probabilities of offspring phenotypes

• Punnett squares determine dominant vs recessive traits

The process of making changes in the DNA code of a living organism is called

• selective breeding 
• genetic engineering
• inbreeding
• hybridization

Two organisms that are closely related would have

• very similar DNA sequence
• exactly the same DNA sequences
• no proteins in common
• completely different DNA sequence

According to this cladogram, birds are LEAST related to -

• Amphibians
• Sharks
• Ray Finned Fish
• Crocodiles

On the cladogram, which organism is the closest relative of the human?

• Frog
• Hare
• Caiman
• Parrot

The bones of the forelimbs of the whale, the human and the bat are very similar. This indicates that they all may

• have descended from a common ancestor

• belong to the same species

• Have to range great distances to eat

If green is dominant over purple, then what is the genotype for this individual?

• Purple
• Green
• GG
• gg

Which of the following terms refers to the different possibilities of a gene?

• chromosome
• DNA
• Punnett Squares
• allele

A phenotype is the...

• letter combination
• dominant gene
• recessive gene
• physical appearance

Tt is-

• homozygous dominant
• homozygous recessive
• heterozygous
• none of these