🧬 Talk the Talk
This term refers to a different form of a gene.
What is an allele?
The genotype shown as “TT” is described using this term.
What is homozygous dominant?
This is the number of dominant alleles needed for a dominant trait to appear.
What is one?
This tool is used to predict the outcome of genetic crosses.
What is a Punnett square?
In a Bb x bb cross, if B = brown and b = white, what percentage of offspring would be brown?
What is 50%?
This word describes an organism with two identical alleles for a trait.
What is homozygous?
A dog with the genotype “Bb” for fur color would show this phenotype if B is dominant. Brown fur color is dominant to white
What is brown fur?
This would be the phenotype for an organism with the genotype “Ll” if L is long fur is dominant to l short fur.
What is long fur?
These are the genotype ratios from a cross of Aa x Aa.
What is AA, Aa & aa?
If both parents are heterozygous for freckles, what percent of kids will have freckles if F is dominant to f no freckles recessive?
What is 75%?
This is the physical expression of a genetic trait.
What is a phenotype?
A plant with the genotype “tt” will have this phenotype combination.
What is homozygous recessive?
Between dominant and recessive, this type of allele is stronger.
What is dominant?
This percentage of offspring would be short if T = tall and t = short, and the cross is Tt x Tt.
What is 25%?
A Punnett square shows the result of a cross between two heterozygous parents. One of the offspring has the genotype "TT." This is how you would classify the offspring’s genotype.
What is homozygous dominant?
This is the difference between a gene and an allele.
What is a gene is a section of DNA that codes for a trait, while an allele is a version of that gene?
An organism with the genotype “Ss” would be described using this genetic term.
What is heterozygous?
If two parents both have blue eyes (a recessive trait), this would be the eye color of their child.
What is blue?
This percentage of offspring would be tall in a Tt x tt cross if T = tall and t = short
What is 50%?
These are the genotype and phenotype ratios for a cross between Aa and aa, if A is dominant.
What is 2 Aa & 2 aa; 2 dominant & 2 recessive?
This term means "same alleles" and is the opposite of heterozygous.
What is homozygous?
True or False: A recessive trait will show when only one recessive allele is present
What is false?
True or False: This is whether a dominant allele will always mask a recessive allele.
What is true?
This is the chance that two heterozygous parents (Bb x Bb) will produce a child who is homozygous recessive.
What is 25%?
A child has attached earlobes (recessive trait). This must be true about the parents’ genotypes.
What is each parent has at least one recessive allele?