Gizmo: Mouse Genetics

Open Ended

What do the offspring look like? Remember, The appearance of each mouse is also called its phenotype.

Open Ended

Predict: What do you think the offspring of a black mouse and a white mouse will look like? 

Open Ended

Do you think mouse offspring will always look like their parents?  Explain:

Open Ended

Do you think mouse offspring will always look like their parents?  Explain:

Open Ended

Observe: Click Breed several times. What do you see?

Open Ended

What do you see now?

Open Ended

Experiment: Turn on Show statistics. Click Breed until there are 100 offspring. How many offspring were black? How many were white?

Multiple Choice

Observe: Turn on Show genotype. Move your cursor over a mouse to see its genotype. What is the genotype of the black parent?

• FF

• ff

• Ff

Multiple Choice

Observe: Turn on Show genotype. Move your cursor over a mouse to see its genotype. What is the genotype of the white parent?

• FF

• ff

• Ff

Multiple Choice

Click Breed. What is the genotype of the offspring mice?

• FF

• ff

• Ff

Multiple Choice

Dominant alleles are always expressed when present. Recessive alleles are not expressed when the dominant allele is also present. Look at the two alleles for fur color. Which allele is dominant, and which fur color does it produce?

• F, black fur

• F, white fur

• f, black fur

• f, white fur

Multiple Choice

Dominant alleles are always expressed when present. Recessive alleles are not expressed when the dominant allele is also present. Look at the two alleles for fur color. Which allele is recessive, and which fur color does it produce?

• F, black fur

• F, white fur

• f, black fur

• f, white fur

Multiple Choice

What is an allele?

• One form that a gene takes, such as brown or blue eyes.

• A molecule found in the nucleus that has the code for life.

• A small piece of DNA

Multiple Choice

What is DNA?

• One form that a gene takes, such as brown or blue eyes.

• A molecule found in the nucleus that has the code for life.

• A small piece of DNA

Multiple Choice

What is a gene?

• One form that a gene takes, such as brown or blue eyes.

• A molecule found in the nucleus that has the code for life.

• A small piece of DNA

Multiple Choice

What is a dominant allele?

• A form of a gene that is always expressed, if the organism has it. Shows as a trait.

• A form of a gene that is only expressed if the organism receives one from each parent. Shows as a trait.

• A characteristic of an organism.

• The genetic makeup of an organism.

Multiple Choice

What is a recessive allele?

• A form of a gene that is always expressed, if the organism has it. Shows as a trait.

• A form of a gene that is only expressed if the organism receives one from each parent. Shows as a trait.

• A characteristic of an organism.

• The genetic makeup of an organism.

Multiple Choice

What is a trait?

• A form of a gene that is always expressed, if the organism has it. Shows as a trait.

• A form of a gene that is only expressed if the organism receives one from each parent. Shows as a trait.

• A characteristic of an organism.

• The genetic makeup of an organism.

Multiple Choice

What is a genotype?

• A form of a gene that is always expressed, if the organism has it. Shows as a trait.

• A form of a gene that is only expressed if the organism receives one from each parent. Shows as a trait.

• A characteristic of an organism.

• The genetic makeup of an organism.

Multiple Choice

What is a phenotype?

• the physical appearance of an organism

• the genetic makeup of an organism

• the offspring has parents with different traits. example brown eyes and blue eyes

Multiple Choice

What is a hybrid organism?

• the physical appearance of an organism

• the genetic makeup of an organism

• the offspring has parents with different traits. example brown eyes and blue eyes

Multiple Choice

What is a purebred organism?

• the physical appearance of an organism

• the offspring has parents with the same traits. example two parents with blue eyes.

• the offspring has parents with different traits. example brown eyes and blue eyes

Multiple Choice

What is a heterozygous genotype?

• An organism with two different alleles for a trait.

• An organism with two of the same alleles for a trait.

• Parents pass their genetic information to their offspring.

Multiple Choice

What is a homozygous genotype?

• An organism with two different alleles for a trait.

• An organism with two of the same alleles for a trait.

• Parents pass their genetic information to their offspring.