Question

parents and offspring
lesson 4
learning target: i can explain why offspring do not look exactly like their parents.
do now
watch the genes. dna and chromosomes video clip and answer the following
questions.

1. genes are made of _.
2. dna in your cells are packed together to form _.
3. humans have _ pairs of chromosomes.
4. you get _ from your mom and _ from your dad.
5. thats a total of _ individual chromosomes in your body.

Explanation:

1. Genes are segments of DNA, so they are made of DNA.
2. DNA in cells is packaged with proteins to form chromosomes.
3. Humans have 23 pairs of chromosomes (46 total, 23 from each parent).
4. You inherit 23 chromosomes from your mom and 23 from your dad (one set from each parent).
5. Since there are 23 pairs, the total number of individual chromosomes is \(23\times2 = 46\).

Answer:

1. DNA
2. chromosomes
3. 23
4. 23 chromosomes, 23 chromosomes
5. 46