Genetics L.16.1

Front

What does Mendel's law of segregation state?

Back

During meiosis, the alleles that control each trait separate, and only one allele from each pair is passed to the offspring.

Front

What is the genotype of a red-flowering plant in a species where red (R) is dominant over white (r)?

Back

The genotype can be either RR or Rr.

Front

What is the phenotype ratio for offspring when T (tall) is dominant in pea plants?

Back

100% tall, 0% short.

Front

What is the phenotype ratio for offspring in a cross of guinea pigs with black hair (dominant) and white hair (recessive)?

Back

9:3:3:1.

Front

Why will all children of two individuals with type O blood have type O blood?

Back

The O allele is recessive.

Front

Define dominant allele.

Back

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

Front

Define recessive allele.

Back

An allele that only expresses its trait when two copies are present.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by the alleles it possesses.

Front

What is a phenotype?

Back

The observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What is a Punnett square?

Back

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