1. Are You… ? Male Female Right Handed Left Handed Tall for Age
Short for Age
Blonde
Brunette
Brown-Eyed
Blue-Eyed
Green-Eyed
Hazel-Eyed
Are You… ?

2. Copy these down… Keyword Definition Dominant Recessive Alleles
Homozygous
Heterozygous
Genotype
Phenotype
Copy these down…

3. Genetic material inside the nucleus of a cell – known as the “blueprint for life.”
DNA

4. What substance translates the genetic code?
RNA- help translate the information from DNA to make Proteins. RNA is like the

5. This type of trait is only expressed when neither parent passes on a dominant allele.
haploid

6. This is the PHYSICAL appearance of an organism based on its alleles.
haploid

7. This type of allele is always expressed if passed on from even just one parent.
metaphase

8. This is the different forms of a gene, like different eye colors, hair colors, etc.
anaphase

9. This is the actual TYPEs of GENEs a person has.
anaphase

10. Dominant- what do the capitol letters represent
Dominant- what do the capitol letters represent? If these were both lower case letters we would call this ? (recessive)
PP- Represents a genotype that is ______________ dominant. The individual gets the same copy of the allele from both parents.

11. Pp- Represents a genotype that is __________
Pp- Represents a genotype that is __________. Individual has one copy of dominant allele and one copy of recessive.
Heterozygous-

12. Which trait will always show if it is present?

13. Alleles Alleles are different versions of the same gene:
Gene = Eye Color
Alleles = Brown, Green, Blue, Hazel
We use an Upper Case letter to show the Dominant form of an allele and a Lower Case version of the SAME letter to represent the recessive (T= tall, t= short)
Everyone has two alleles
One from mom, one from dad
Individuals with two of the same alleles are homozygous for that trait
Individuals with one dominant copy and one recessive copy have a heterozygous genotype
Alleles

14. Is genotype or phenotype what we see when we look at an organism?

15. Genotype and Phenotype
Geno = Genes
Genotype- alleles
Phenotype- physical appearance, expression of alleles
Pheno = Physical
Genotype and Phenotype

16. Building a Punnett Square
Draw FOUR boxes for a single cross
Building a Punnett Square

17. Building a Punnett Square
Parent 1
Label one side Parent 1 and the other Parent 2
Parent 2
Building a Punnett Square

18. Building a Punnett Square
Parent 1
Place the two alleles for Parent 1 across the top, one per box. Place the two alleles for Parent 2 vertically across the side.
Parent 2
Building a Punnett Square

19. Building a Punnett Square
Parent 1
Perform the cross. Remember each Parent can only pass 1 allele to their offspring. So for the 2 alleles from each parent, you will have 4 possible outcomes.
Parent 2
Let’s try it!
Bb x Bb
Building a Punnett Square

20. If we only see red-headed offspring, is red ALWAYS the only possible allele?

21. What is a ratio?
In a cross with 2 heterozygotes, the phenotype ratio of the offspring will always be ___ : ___ meaning that 3 out of 4 will express (show) the dominant trait and only 1 out of 4 is likely to show the recessive
Ratios

22. For 2 heterozygous individuals, the genotype ratio of their offspring will be 1:2:1, meaning that __ individual(s) will be homozygous dominant, __ individual(s) will be heterozygous, and __ individual(s) will be homozygous recessive.
Ratios