Genes
Where do you get your genes from?
(genes, not jeans)
Your parents.
What is the process called where 1 cell copies itself exactly, creating 2 identical cells?
Mitosis
How many genomes does each person have?
1
The way a gene actually appears is called...?
Phenotype
Which of the following are homozygous gene pairs?
a) Bb
b) aA
c) ab
d) BB
Only option d) BB
Two different versions of the same gene are called....?
Alleles
What is the process called where a cell divides itself into 2 cells, each with only half of the genome?
Meiosis
If we think of the genome as a book, what are the chapters called?
Chromosomes
Where do you find today's date in my room?
The divider whiteboard!
If both of your parents have naturally blonde hair, is it possible for you to have brown hair?
No!
How many copies of each gene do you have?
2
Explain this memory trick:
Mitosis = mi-TWO-sis
In mitosis, one cell copies itself into TWO identical cells.
How many genes does each person have?
Lots!
On your whiteboard, create an example of a Punnett Square of this:
BB x Bb
You have 1 minute!
_B_ _B_
b| Bb | Bb |
b| Bb | Bb |
Which of the following are heterozygous gene pairs:
a) Ee
b) EE
c) ee
d) eE
Options a) and d)
Explain how this example is similar to how alleles work:
gato <--> cat
Both of these words describe the same thing, but in different languages, just like alleles describe the same trait but in different ways.
How many chromosomes do people receive from each parent?
23 chromosomes (typically)
When DNA is organized into Chromosomes, what do they kind of look like (according to Mr Keeling)
Ugly Butterflies
Using your whiteboard, create a Punnett Square that shows me the possible offspring for these parents:
Dad: Bb
Mom: Bb
_B_ _b_
B| BB | Bb |
b| Bb | bb |
An allele that always overpowers a more "shy" allele is referred to as...?
Dominant
Is it possible for parents that both have brown hair to have 6 children, all with blonde hair?
Yes!
Explain why it isn't a problem for you when gametes (egg/sperm cells) contain only half a genome each.
You get half from mom, half from dad, making 1 complete genome.
How many individual chromosomes does each person have?
46 chromosomes (typically)
Can a recessive allele change the phenotype of a person if it is part of a heterozygous gene pair?
No!
Which of the following are heterozygous gene pairs? (remember, what does hetero mean)
a) YY
b) Ww
c) YW
d) Yw
Options b), c), and d)