Chromosomes carry DNA and are made up of genes. In humans, body cells contain 46 chromosomes that come in 23 pairs, with one chromosome of each pair coming from the male parent and the other from the female parent. Homologous chromosome pairs are similar in size, shape, and genes. Sex cells such as eggs and sperm contain only 23 chromosomes each as a result of meiosis, which reduces the number of chromosomes in sex cells.

2. Chromosome = Books
Genes = Words
DNA = Letters
 Chromosomes are the carriers of _________
 Genes are made up of small pieces of _________

3.  46 total chromosomes
 23 chromosomes come
from the female parent
 23 chromosomes come
from the male parent

Each chromosome
from the male parent has a similar chromosome
from the female parent
 Homologous chromosomes are similar in size and
shape and have similar genes

4.  2 compete sets of
chromosomes.
 1 from male parent
1 from female parent
Ex) Body Cells
In humans, diploid number
(2N) = ___
 1 compete set of
chromosomes.
Ex) Sex Cells (egg and
sperm)
In humans, haploid number
(N) = ___

5.  When meiosis is used to make gametes, it is
known as ______________________
 When meiosis is used to make sperm cells, it
is known as ______________________
 When meiosis is used to make egg cells, it is
known as ______________________