Gregor Mendel's Experiments
What plant did Mendel use to study how traits were passed from parent to offspring?
Pea plants
physical characteristics of an organism
phenotype
How many alleles does a genotype have?
2
Each box of a monohybrid Punnett square has a ____% of occurring.
25
A phenotype and genotype ratio from a monohybrid cross will always have a sum of ____.
4
Each characteristic that Mendel studied had how many contrasting traits?
2
an allele that is masked when a dominant allele is present
recessive allele
How many alleles are required in a genotype in order to show the dominant trait?
1
Which of the following is NOT a possible genotype produced from the following cross: Bb x bb?
A. bb
B. BB
C. Bb
D. BB and Bb
B. BB
Which of the following is NOT a possible genotype produced from the following cross: FF x ff?
A. ff
B. FF
C. Ff
D. FF and ff
D. FF and ff
In Mendel's first experiment, he crossed two true-breeding plants. Give an example of what these plants' genotypes would have looked like.
GG x gg
likelihood that a particular event will occur
probability
What genotype(s) produce the dominant trait? (You must write the name of the genotypes, not the alleles)
Homozygous dominant and Heterozygous
What is the phenotype ratio of the following cross: BB x Bb?
4:0
What is the phenotype ratio of the following cross: Gg x Gg?
3:1
What was the result of Mendel's first experiment?
He discovered that all of the offspring had the dominant trait.
the passing of traits from parent to offspring
heredity
If green peas are recessive to yellow peas, what phenotype will a plant with alleles Gg have?
Yellow peas
What is the genotype ratio of the following cross: BB x Bb?
2:2:0
What is the phenotype ratio of the following cross: Gg x Gg?
3:1
What was the result of Mendel's second experiment?
He saw that the majority of the offspring had the dominant trait, but that the recessive trait showed up again.
offspring of the P generation
F1 Generation
If straight hair (H) is dominant to curly hair (h), what genotype(s) produce curly hair?
hh
Tall (T) plants are dominant to short (t) plants.
What is the genotype ratio if a heterozygous plant is crossed with a short plant?
0:2:2
Brown (B) eyes are dominant to green (b) eyes.
What is the genotype ratio if a person homozygous with brown eyes is crossed with a green-eyed person?
0:4:0