Ch 12.4 Lecture

Ch 12.4 Lecture

Meiosis

Multiple Choice

If an organism has 12 pairs of chromosomes in the nucleus, after a cell goes through MITOSIS, how many pairs of chromosomes will there be in the nucleus of the new cells?

• 6 pairs

• 12 pairs

• 12 singles

• 24 pairs

Multiple Choice

If a cell splits in to two during mitosis, how does each daughter cell get a complete set of the DNA?

• it doesn't get a complete set

• the DNA forms an exact copy before the cell divides

• the DNA duplicates after the cell divides

• who cares

Multiple Choice

All the cells in the human body are haploid except for the egg and sperm cells.

• True

• False

Multiple Choice

Homologous chromosomes have the same genes at the same locations, but they may have different forms (alleles) for that gene.

• True

• False

Multiple Choice

Diploid cells are abbreviated as 2N because they have two of every chromosome.

• True

• False

Multiple Choice

Egg cells and sperm cells are produced by the process of mitosis.

• True

• False

Multiple Choice

DNA does not have to replicate before meiosis because the egg cells and sperm cells only need half of the DNA.

• True

• False

Multiple Choice

Meiosis consists of two cycles of PMAT.

• True

• False

Multiple Choice

Metaphase in Meiosis 1 is different than metaphase in mitosis because...

• the chromosomes line up on the equator

• the chromosomes line up on the equator next to their homologous pair

• metaphase is the same in meiosis and mitosis

• no clue

Multiple Choice

What stage does crossing over take place?

• prophase 1

• prophase 2

• anaphase 1

• anaphase 2

Multiple Choice

Each chromosome has two copies in meiosis 1.

• True

• False

Multiple Choice

The DNA replicates again between meiosis 1 and meiosis 2.

• True

• False

Multiple Choice

Meiosis results in four haploid cells (1N) from one diploid (2N) parent cell.

• True

• False

Multiple Choice

Why are genes on the same chromosome not always inherited together?

• Because of crossing over

• Because of mutations

• They are always inherited together

• who knows

Multiple Choice

Genes that are far apart on chromosomes are MORE likely to be inherited together than two genes that are close together.

• True

• False