PMA 5 Review Heredity and Reproduction

Why might a biologist use mice when explaining how heredity works in humans?

• Mice and humans look alike.

• Mice are smarter than humans.

• Mice and humans are genetically similar.

• Mice eat a lot and do not move very much.

The term "hetero-" means:

Which is the correct hierarchy from smallest unit of organization to the largest unit of organization?

• DNA, chromosome, gene

• gene, chromosome, DNA

• DNA, gene, chromosome

• gene, DNA, chromosome

Scientists use mice in place of humans in genetic testing because...

• mice and humans look alike.

• mice are smarter than humans.

• mice and humans are genetically similar

• mice eat a lot and do not move very much.

Scientists want to make a model of DNA so that others might learn from it. What type of model should the scientists make?

• a physical model

• a computer model

• a conceptual model

• a mathematical model

Why is looking at a plant and animal cell not considered to be an expeirment?

• It requires the use of an expensive piece of equipment.

• It invovles only looking at part of the organism and not the whole organisms.

• There are no variables to test.

• An analysis of her observations would be visal instead of mathematical.

_______________ are comprised of segments of DNA called genes that control the traits that are passed from parent to offspring.

• Chromosomes

• Traits

• Genes

• Cells

In every organism, how many chromosomes are in the sex cells compared to the body cells?

• always half as many as in the body cells

• always 23

• always twice as many as in the body cells

• alays as many as in the body cells

What is the relationship between chromosomes and genes?

• Chromosomes correspond to the phenotype, while genes correspond to the genotype.

• Genes correspond to the phenotype, while chromosomes correspond to the genotype.

• Genes are segments of DNA that are located on the chromosomes of each cell

• Genes are made up of thousands of chromosomes.

The offspring is gentically identical to the parent with ____________ reproduction. Fill in the blank with "sexual" or "asexual".