Vocabulary
definition of Dominant?
the greater allele, capital letters
If one parent is heterozygous for blue eyes (B) and one parent has green eyes (b)
What are the genotypes of the parents?
Bb and bb
What trait might Juan have inherited from his parents?
A.Scar on cheek B. Blue eyes
C. Ability to play basketball D. Enjoying cooking
B.Blue eyes
If one parent is heterozygous for blue eyes (B) and one parent has green eyes (b) what are the possible phenotypes of the offspring?
Blue eyes: 50%
Green eyes: 50%
Similarities are passed from parents to offspring through ___________
A. Touch. B.Genes
C. Blood. D.Learning
B.Genes
Definition of recessive?
weaker, under the dominant allele
Lower case letters
attached earlobe is dominant over free hanging earlobe. Complete a punnett square for the following individuals. Mom=BB Dad=bb
What are the possible Genotypes?
Bb
Why might Brandon have curly black hair like his mother, but not be able to cook as well as her?
Hair color is an inherited trait, but cooking is a learned/acquired trait.
attached earlobe is dominant over free hanging earlobe. Complete a punnett square for the following individuals. Mom=Bb Dad=Bb
What are the possible phenotypes?
attached earlobe=75%
non attached earlobe=25%
Q. What trait did an oak tree likely inherit from its parent?
A. Broken branch. B.Scar in bark
C.Hollow in the trunk D.Leaf shape
D. leaf shape
Definition of homozygous?
same
Example BB or bb
Freckles are recessive. No freckled are dominant. The mom has no freckles. The dad is heterozygous for freckles.
What are the possible genotypes?
Ff and ff
Which is an example of an acquired/learned trait?
A. Dimples. B.Left handedness
C. Writing. D.Tongue rolling
C. Writing
Freckles are recessive. No freckled are dominant.
Mom=heterozygous dad=homozygous dominant.
What are the possible phenotypes?
Freckles:50%
no freckles: 50%
What is stored in the chromosomes?
A. The instructions for all of your traits
B.Only the instructions for the traits from your mother.
C.Only the instructions from your father
D.Nothing chromosomes are a fancy car part
A. The instructions for all of your traits
Definition of heterozygous?
different
example: Hh
Which of the following is a phenotype?
A. Aa B.red hair
C.heterozygous. D.DNA
B. red hair
Which characteristic is NOT inherited?
A. Hairline (straight or widow's peak)
B. Spoken language (English, Spanish, etc...)
C. Earlobes (attached or detached)
D. Hair type (straight or curly)
B. Spoken language (English, Spanish, etc...)
curly hair is recessive, and straight hair is dominant. A woman with curly hair marries a man who is homozygous dominant for straight hair. Predict the outcomes for their children.
Genotypes%
Phenotype %
Genotype:
Cc:100%
Phenotype
curly:0%
straight:100%
What tool can you use to help figure out the probability of a trait being dominant or recessive?
Punnett square
Q. Purebred is another word for __________, while hybrid is another word for __________.
A. dominant; recessive B.recessive; dominant
C.homozygous; heterozygous.
D.heterozygous; homozygous
C.homozygous; heterozygous.
B. a trait
A boy and his father each have a small scar on one arm. Which best describes the boy's scar?
inherited or acquired/learned?
acquired/learned
4. SpongeBob SquarePants recently met SpongeSusie Round-pants at a dance. SpongeBob is heterozygous for his square shape, but SpongeSusie is purebread round. Create a Punnett square to show the possibilities that would result if SpongeBob and SpongeSusie had children. Genotype % , Phenotype%
genotypes:
RR 50% and Rr 50%
Phenotype:
Round 100%
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
25%