Genetics

Front

What is the probability of a child having blue eyes if both parents are heterozygous brown-eyed (Bb)?

Back

25%

Front

Define a recessive allele.

Back

An allele whose trait only shows up when no dominant allele is present.

Front

In a Punnett square, what is the genotypic ratio when crossing two heterozygous tall plants (Tt)?

Back

1:2:1

Front

Which genotype represents a recessive trait in genetics?

Back

bb

Front

How many alleles does an offspring receive from each parent for a specific trait?

Back

One.

Front

What is the definition of a dominant allele?

Back

An allele that expresses its trait even in the presence of a recessive allele.

Front

What is a Punnett square used for in genetics?

Back

To predict the genotypes and phenotypes of offspring from genetic crosses.

Front

What is the phenotypic ratio of offspring from a cross between two heterozygous tall plants (Tt)?

Back

3:1 (3 tall : 1 short).

Front

What does the term 'homozygous' mean in genetics?

Back

Having two identical alleles for a particular gene (e.g., BB or bb).

Front

What does the term 'heterozygous' mean in genetics?

Back

Having two different alleles for a particular gene (e.g., Bb).