Vocabulary
Define Heredity
How traits are passed from one to their offspring (physical and mental)
What is the purpose of a Punnett Square?
To predict the possible genotypes and phenotypes of the offspring.
Where does every animal get their traits from?
Their biological mother and father.
How many chromosomes do humans have?
46
How many chromosomes do humans get from each parent?
23
Which is the definition of Homozygous?
A. An organism that has two different alleles for a trait
B. The genetic construction of an organism
C. An organism that has two of the same alleles for a trait
D. Observable characteristics of an organism
C. An organism that has two of the same alleles for a trait
Which is the correct way to write the following recessive hair color traits:
A. Blonde Hair (Bb)
B. Blonde Hair (BB)
C. Blonde Hair (bb)
D. Blonde Hair (bB)
C. Blonde Hair (bb)
Give two examples of traits for animals (not humans)
Possible Examples: Hairless, the color of fur, scales, wing size, etc..
Which of these is an example of phenotype?
A. BB
B. Chromosomes
C. 25%
D. Brown Eyes
D. Brown Eyes
Give two examples of Mutations
Possible Answers: Cystic Fibrosis, sickle-cell anemia, color blindness, Klinefelter syndrome, Lactose Tolerance, Albino, Cancer, etc..
What vocabulary word matches this definition: The observable characteristics of an organism (physical looks)
Phenotype
Please draw and fill out a Punnett Square for these two parents. Tt and Tt
Draw on board
Which of the following traits is dominant?
A. Blue Eyes
B. Brown Hair
C. Right over Left Thumb
D. Cannot taste PTC Paper
B. Brown Hair
Where is the DNA located?
Inside the cell's nucleus
What is the threadlike structure within a cell's nucleus that contains the DNA?
Chromosomes
What is the definition of Mutation?
When a gene/DNA has been altered in some way
What are the possible Genotypes and Phenotypes for the offspring of these two parents: Hh and hh. (H has hair, h is hairless)
Hh - Has hair
hh- hairless
Give FOUR examples of recessive traits
Possible Answers: Blonde/Red hair, Blue/Green/Hazel Eyes, Right over Left Thumb, Cannot Taste PTC paper, Cannot Roll Tongue, left-handed, no freckles, no dimples, etc...
Who was the scientist that studies the genetics of Pea Plants?
Gregor Mendel
What percent of humans are said to be left-handed?
A. 1%-3%
B. 5%-30%
C. 7%-10%
D. 25%
B. 5%-30% of humans are left-handed
Define Incomplete Dominance
When the dominant allele does not completely mask the recessive allele - resulting in a mix in appearance
Create a Punnett Square and write the genotypes and phenotypes for this Incomplete Dominance Pair: (R=red, r= white, Rr=pink)
Rr and Rr
Draw out the Punnett Square:
Geno/Pheno:
RR- red (1)
Rr - pink (2)
rr - white (1)
True or False: If two parents with brown eyes have children, their children will always have brown eyes? Why or why not?
False, they could both be carrying the recessive gene for eye color.
What are the 4 letters for the base pairs?
A, C, T, G
How many chromosomes do pandas have?
A. 21
B. 30
C. 32
D. 40
A. 21 pairs of chromosomes