STAAR Biology Category 2 Review

Front

What is the sugar found in DNA?

Back

Deoxyribose

Front

What is the sugar found in RNA?

Back

Ribose

Front

What is the difference between DNA and RNA sugars?

Back

DNA has deoxyribose sugar while RNA has ribose sugar.

Front

What does a Punnett square represent in genetics?

Back

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

Front

What is the probability of obtaining a recessive trait from two heterozygous parents?

Back

25%.

Front

How many chromosomes do human somatic cells have?

Back

46.

Front

How many chromosomes do human gametes have?

Back

23.

Front

What is the genotype of an individual with a recessive disorder?

Back

hh.

Front

What does 'dominant' mean in genetics?

Back

A dominant allele is one that expresses its trait even when only one copy is present.

Front

What does 'recessive' mean in genetics?

Back

A recessive allele is one that expresses its trait only when two copies are present.