Genetics

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Front

What is the phenotypic ratio when crossing two heterozygous tall plants (Tt)?

Back

3:1, where 3 are tall and 1 is short.

Front

Define genotype.

Back

Genotype refers to the possible combination of alleles in a gene.

Front

What is the genotypic ratio when crossing two heterozygous plants (Tt x Tt)?

Back

1:2:1, where 1 is TT, 2 are Tt, and 1 is tt.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene.

Front

What is the recessive genotype for brown fur in dogs?

Back

bb, where 'b' represents the allele for brown fur.

Front

What is the percentage of genotypes when a homozygous dominant dog (BB) is crossed with a heterozygous dog (Bb)?

Back

50% BB and 50% Bb.

Front

What is the difference between phenotype and genotype?

Back

Phenotype is the physical expression of the genes, while genotype is the genetic makeup.

Front

What is the dominant trait in the given plant example?

Back

Tall (T) is the dominant trait over short (t).