Genetic variation

Differences that exist naturally among members of a population or species___?

• mutation
• adaptation
• variations
• evolution

Species with ______variation are ______likely to survive.

• more, less
• less,less
• less,more
• more,more

Differences in DNA between individuals or populations

• Environmental Variation

• Genetic Variation

• Adaptive Feature

• Genetic Engineering

What can cause an offspring to have a physical trait neither of its parents has?

• a mutation in a parent’s sex cell

• the natural selection of a trait

• the artificial selection of a trait

• a mutation in a parent’s body cell

In sexual reproduction, why are the offspring not genetically identical to their parents?

• Offspring of sexual reproduction are genetically identical to their parents because they are a unique combination of the DNA from both parents.

• Offspring of sexual reproduction are not genetically identical to their parents because they are a unique combination of the DNA from both parents.

• Offspring of sexual reproduction are not genetically identical to their parents because they are not a unique combination of the DNA from both parents.

A mutation occurs at the genetic level. What does this cause?

• The gene (allele) makes a different protein

• The gene (allele) codes for a different trait

Mutations are a source of _______________.

• Variation

• Disease

• Polypeptide

Would a mutation in the DNA of a skin cell be passed on to an organism's offspring?

• Yes, because any change to the DNA is passed on to the offspring

• Maybe. Sex cells only use half of the body's genetic code. It might get the copy of a gene that wasn't mutated.

• No. Only mutations that occur in the gametes (sex cells) are passed on to the offspring

• Without knowing the animal, it would be hard to tell whether or not the mutation would be passed on.

Mutations are important because they bring about

• death of the organism in which they develop
• genetic variation needed for a population to evolve
• benefits for the individual, not for the population
• Hardey-Weinberg equilibrium within a population

Heavy metals lead, mercury can interfere with the process in which DNA is copied, if this process goes wrong, the daughter cells will get faulty DNA when the cell divides. Chemicals which can cause mutations are called

• mutations

• mutagens

• meiosis

• genetic mutations