Genetics Mid-Unit Review

Meiosis

100

How many divisions take place during meiosis?

2

200

The products of meiosis are: 

A. identical haploid cells

B. non-identical haploid cells

C. non-identical diploid cells

D. identical diploid cells

B.

300

How many cells are there at the end of meiosis?

4

400

What happens during crossing over?

Non-homologous chromosome arms cross over and a piece breaks off and reattaches to the other chromosome

500

Name one of the ways meiosis creates genetic variation.

Crossing over or independent assortment

Punnett Squares

100

Set up a punnett square using the letter B for a cross between two homozygous dominant parents.

Ms. Leonard will check

200

If you crossed a homozygous dominant parent with a homozygous recessive parent, what is the probability the offspring will be heterozygous?

100%

300

A punnett square was completed and the offspring's potential genotypes were: BB, Bb, Bb, bb. What is the genotypic ratio?

1:2:1

400

A punnett square was completed and the offspring's potential genotypes were: BB, Bb, Bb, bb. What is the phenotypic ratio?

3:1

500

If a heterozygous and homozygous dominant parent had a child, what are the chances it would be homozygous recessive?

0%

Vocabulary

100

What is genetics the study of?

Answers may vary (something about how traits are passed down from parents to offspring)

200

What is an allele?

A variation of a gene

300

What is the difference between homozygous and heterozygous?

Homozygous means two of the same allele and heterozygous means different alleles

400

What is a gamete?

A haploid reproductive cell (a sperm or egg cell)

500

What is meiosis?

The division of reproductive cells 

Inheritance

100

Give an example of a polygenic trait

Answers may vary

200

Which blood type is an example of codominance?

Type AB

300

Can two parents who are blood type AB have a child who is type O? Prove it with a punnett square.

No

400

Pretend fur color for mice is an example of incomplete dominance. Homozygous dominant mice have black fur and homozygous recessive mice have white fur. What color fur would a heterozygous mouse have?

Grey (or anything in between black and white)

500

Pretend fur color for mice is an example of codominance. Homozygous dominant mice have black fur and homozygous recessive mice have white fur. What color fur would a heterozygous mouse have?

Black and white fur