8th grade 2nd 9 weeks science test

Front

What is a mutation?

Back

A mutation is a change in the DNA sequence that can lead to changes in traits or characteristics of an organism.

Front

Are all mutations genetic?

Back

False. Not all mutations are passed down from parents; some occur spontaneously.

Front

What does probability refer to in science?

Back

Probability refers to the likelihood that a particular event will occur.

Front

What do mutations cause changes in?

Back

Mutations cause changes in proteins.

Front

What is a Punnett square used for?

Back

A Punnett square is used to predict the probability of certain traits in offspring based on parental genotypes.

Front

If B = brown fur and b = white fur, what is the probability of getting white fur from a Bb x Bb cross?

Back

50%.

Front

What can fossils tell us about the past?

Back

Fossils can provide evidence about what organisms were like and the environments they lived in.

Front

What is the significance of finding a fossil in a certain location?

Back

It can indicate the environmental conditions that existed in that area in the past.

Front

Define genotype.

Back

Genotype is the genetic makeup of an organism, representing the alleles inherited from its parents.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic constitution, while phenotype refers to the observable traits of an organism.