Definitions
True/False
Adaptations
Punnett Square
Miscellaneous
100
What is a trait?
A distinguishing characteristic of an organism
100
Every trait has at least two alleles
What is true
100
This environmental factor can affect height in humans.
What is nutrition?
100
Determine the probability the offspring will have brown or blue eyes using the following info:
Father: Dominant brown (BB)
Mother: Recessive blue (bb)
100% brown
100
What is mutation
a permanent change in the sequence of DNA in a gene.
200
a
200
The recessive allele masks the dominant allele
False
200
This environmental factor can influence fur thickness in animals.
What is climate or temperature
200
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.
100% straight hair
200
What is natural selection
The process by which organisms with helpful traits survive and reproduce more often.
300
What is genotype?
An organism’s complete set of genes
300
A trait can be inherited or acquired
True
300
Which type of adaptation is this:
The color and shape of an insect’s eyes
structural
300
A heterozygous tall plant is crossed with a homozygous short plant (tall is the dominant height).
Tt × tt
Genotypes: 50% Tt, 50% tt
Phenotypes: 50% tall, 50% short
300
Which trait cannot be inherited:
scars
big feet
red hair
shyness
Scars
400
What is phenotype?
is how a trait looks or is expressed
400
This is an example of heterozygous alleles:
TT
False
400
Identify the type of adaptation: Some animals, like snakes, play dead
behavioral
400
A heterozygous spotted dog is crossed with a heterozygous spotted dog (solid fur is recessive).
Heterozygous spotted × heterozygous spotted
Ss × Ss
Genotypes: 25% SS, 50% Ss, 25% ss
Phenotypes: 75% spotted, 25% solid
400
A homozygous dominant striped fish is crossed with a homozygous recessive solid-colored fish.
S = striped, s = solid
Cross: SS × ss
Genotypes:
100% Ss
Phenotypes:
100% striped
500
How many chromosomes do humans have
23 pairs in each body cell
500
Natural Selection is when humans choose organisms with desired traits to reproduce.
False
500
Identify the type of adaptation:shedding or spitting venom
functional
500
A heterozygous tall pea plant is crossed with a homozygous short pea plant.
1. Heterozygous tall × homozygous short
T = tall, t = short
Cross: Tt × tt
Genotypes:
50% Tt
50% tt
Phenotypes:
50% tall
50% short
500
B