Genotypes
The Creed ladybug can be red (R) or yellow (r). What genotype(s) can have a yellow Creed ladybug have?
rr
P = purple and p = white. What phenotype will a Pp pea plant have?
Purple
100% Rr
100% red
What are the genotypes of individuals II-1, II-2, and II-3? (Use the letter "A").
II-1: Aa
II-2: Aa
II-3: aa
The Todd flower can have five petals (F) or three petals (f). What genotype(s) could a Todd flower with five petals have?
FF or Ff
P = purple and p = white. What phenotype will a pp pea plant have?
The Todd flower can either have no scent (N) or smell very sweet (n). Give all the probabilities of each genotype and phenotype if you cross a NN flower with an Nn flower.
50% NN + 50% Nn
100% no scent
If individual II-5 has children with a heterozygous individual, what is the probability that the offspring will have the disease phenotype?
75%
The zooba monster can have a long tail (L) or a short tail (l). Write all of the possible genotypes for this trait, and label them as either homozygous dominant, heterozygous, or homozygous dominant.
LL: homozygous dominant
Ll: heterozygous
ll: homozygous recessive
Define "phenotype."
The physical trait that is expressed.
You cross two dogs that heterozygous for fur texture. What are the probabilities of the possible genotypes and phenotypes in the offspring? F = fluffy, f = smooth.
25% FF, 50% Ff, 25% ff
75% fluffy, 25% smooth
Using the letter A, what is the most likely genotype of individual I-2? Explain why.
Most likely AA - none of the offspring have the disease. Plus, if it's a rare disease, it's unlikely that people marrying into the affected family are carriers anyway.
Mendel discovered the peas of his pea plants were always either round (R) or wrinkled (r). What was the genotype of heterozygous pea plants?
Rr
Blue and yellow
Todd flowers can be red or orange. If red is the dominant trait, what are the probabilities of each genotype and phenotype if you cross a heterozygous Todd flower with a homozygous recessive Todd flower?
50% Rr = 50% red
50% rr = 50% orange
If individual II-8 has children with a man who is homozygous dominant, what is the probability that their children will be carriers of the disease?
50%
The combination of letters used to represent the two alleles an individual has.
The gene for fur length in the flurfle exhibits incomplete dominance. If L = long and l = short, what phenotype would heterozygous individuals have?
Medium length tail
The Palmer flower can be purple, white, or purple with white spots. If you cross two purple flowers with white spots, what is the probability of each genotype and phenotype in the offspring?
25% PP, 50% PW, and 25% WW
25% purple, 50% purple with white spots, 25% white