Change Over Time
Genotype Detective
Alpha vs. Beta
(dominant vs. recessive)
(dominant vs. recessive)
Probably
Celebrity Shot
100
This campus raised wild and city Dark-eyed Junco birds in the same environment to determine whether their differences were genetic or environmental.
What is UCSD?
100
This genotype represents a homozygous dominant organism using the letter B.
What is BB?
100
This type of trait only appears with two lowercase alleles.
What is recessive?
100
A cross between Ss and Ss produces this percentage of homozygous recessive offspring.
What is 25%?
100
This athlete is often discussed as an example of inherited athletic traits due to similarities with his son Bronny.
Who is Lebron James?
200
When a trait becomes more common in a population over generations, this process is occurring.
What is evolution?
200
This genotype represents a heterozygous organism using the letter T.
What is Tt?
200
In a genotype of Aa, this allele type is expressed.
What is dominant?
200
This is the probability of producing a heterozygous offspring from BB × bb.
What is 100%?
200
Being left-handed like Angelina Jolie is recessive.
Being right-handed like Brad Pitt is dominant.
If both are heterozygous, this describes the probability of a left-handed child.
What is 25% left-handed and 75% right-handed?
300
This famous black-and-white insect became darker during the Industrial Revolution due to natural selection.
What is the peppered moth?
300
This genotype represents a homozygous recessive organism using the letter F.
What is ff?
300
In a genotype of bb, this type of trait is expressed.
What is recessive?
300
This is the probability of producing a homozygous recessive offspring from Aa × Aa.
What is 25%?
300
Kanye West is homozygous dominant for hair color. Kim Kardashian is heterozygous for hair color.
If the couple has 12 children. This is the percentage of offspring with heterozygous hair color.
What is 6?
400
This scientist is known as the “Father of Genetics” after studying pea plants.
Who is Gregor Mendel?
400
These are the two possible genotypes for a purple flower if purple is dominant.
What are PP and Pp?
400
This type of trait appears whenever at least one capital letter allele is present.
What is dominant?
400
This type of cross most commonly produces 75% dominant phenotypes.
a) homozygous x homozygous
b) heterozygous x heterozygous
c) heterozygous x homozygous
What is heterozygous × heterozygous?
400
Having dimples like Tom Holland is dominant.Not having dimples like Zendaya is recessive.
If Tom Holland is homozygous and Zendaya is homozygous recessive, this would describe the possible genotypes and phenotypes of their children.
What is a 100% chance of dimples (Dd).
500
This animal became famous in 1996 as the first mammal successfully cloned from an adult cell.
What is a sheep? (Dolly the Sheep)
500
This genotype must be present for a recessive trait to appear.
What is homozygous recessive?
500
This genotype combination guarantees the recessive phenotype will appear.
What is homozygous recessive?
500
This is the number of possible genotypes from a Tt × Tt cross.
What is 3?
500
Having a widow's peak like Leonardo DiCaprio is dominant.
Not Having a widow's peak like Rihanna is recessive.
If Leonardo DiCaprio (heterozygous) and Rihanna had children, this would be the possible genotypes and phenotypes of their children.
What is a 50% chance of widow's peak (Bb) and 50% chance of no widow's peak (bb)?