Sister chromatids and Homologous Chromosomes

Why does a cell replicate its DNA before it divides?

• To make the cell larger

• To ensure each new cell receives a complete set of DNA

• To change the genetic information

• To prepare for fusion with another cell

What are sister chromatids?

• Two different chromosomes from different parents

• Two identical copies of a chromosome joined together

• Two cells that have just divided

• Parts of the cell's nucleus

What structure holds two sister chromatids together?

• Nucleus

• Cell membrane

• Centromere

• Mitochondria

Which statement accurately describes a difference between sister chromatids and homologous chromosomes?

• Sister chromatids are always different sizes, while homologous chromosomes are the same size.

• Sister chromatids have identical alleles, while homologous chromosomes can have different alleles.

• Sister chromatids are not held together by a centromere, but homologous chromosomes are.

• Sister chromatids carry different genes, while homologous chromosomes carry the same genes.