STAAR Biology Category 2 Review

Front

What is tRNA?

Back

tRNA (transfer RNA) is a type of RNA that helps decode a messenger RNA (mRNA) sequence into a protein. It carries amino acids to the ribosome during protein synthesis.

Front

What is the difference between DNA and RNA sugars?

Back

DNA has a deoxyribose sugar, while RNA has a ribose sugar.

Front

What is incomplete dominance?

Back

Incomplete dominance is a type of inheritance where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.

Front

What is codominance?

Back

Codominance is a type of inheritance where both alleles in a heterozygote are fully expressed, resulting in a phenotype that shows both traits.

Front

What is polygenic inheritance?

Back

Polygenic inheritance is a type of inheritance where multiple genes influence a single trait, resulting in a continuous range of phenotypes.

Front

What is multiple alleles?

Back

Multiple alleles refer to the presence of more than two alleles for a genetic trait within a population.

Front

What is the genotype for red flowers in snapdragons?

Back

The genotype for red flowers in snapdragons is RR (homozygous dominant).

Front

What is the genotype for white flowers in snapdragons?

Back

The genotype for white flowers in snapdragons is rr (homozygous recessive).

Front

What is the phenotype of a heterozygous snapdragon (Rr)?

Back

The phenotype of a heterozygous snapdragon (Rr) is pink flowers due to incomplete dominance.

Front

What is the result of a cross between RR and rr snapdragons?

Back

The result of a cross between RR and rr snapdragons is 100% pink flowers (Rr).