Chromosomes and Meiosis

Chromosomes and Meiosis

Open Ended

Is it possible for Lucy and Maria to be biological twins-Why do you think it is possible? Or why is it NOT possible?

Poll

What is a chromosome?

• an X-shape skin cell

• a long strand of DNA containing genes

• a piece of material found in your bones

Homologous Chromosome

Multiple Choice

How many pairs of homologous chromosomes are in the karyotype image?

• 2

• 22

• 23

• 4

Fill in the Blanks

Sister chromatids are

of the homologous chromosome.

Multiple Choice

Karyotypes contain 22 autosome chromosomes and the last pair is the sex chromosome. Is this individual a male or a female?

• male

• female

• can't tell

Multiple Select

How are body cells different from sex cells? Check all that apply.

• gametes have 23 chromosomes

• only DNA in sex cells is passed down to offspring

• body cells contain 46 chromosomes

• body cells contain half the dna from dad and half the dna from mom

Open Ended

Why do brothers and sisters have different chromosomes even though they have the same parents?

Open Ended

Why do these twins share many of the same traits?

Open Ended

The father of the twins has entirely Caucasian chromosomes. The mother has half Caucasian and half Jamaican chromosomes. Explain now why the twins look different.