Mendelian Genetics

Front

In pea plants, the trait for tall stems is dominant over the trait for short stems. If two heterozygous tall plants are crossed, what percentage of the offspring would be expected to have the same phenotype as the parents? Options: 100%, 75%, 50%, 25%

Back

75%

Front

The observable traits of an organism are known as its

Back

phenotype

Front

Each parent contributes one of the genes for a particular trait. The genes of the pair are called: variables, gametes, hybrids, alleles

Back

alleles

Front

In snapdragons, Tallness (T) is dominant to dwarfness (t). In a cross between two plants that are homozygous for the recessive allele, what percent of offspring are expected to exhibit tallness? Options:  25%,  75%, 100%, 0%

Back

0%

Front

The color black is dominant in guinea pigs. The phenotypes of homozygous black guinea pigs and heterozygous black guinea pigs are:

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black

Front

The gene makeup of an organism for a particular trait is known as its

Back

genotype

Front

What is the percentage of homozygous recessive offspring? Options: 0%, 25%, 50%, 75%

Back

50%

Front

Genotype for a heterozygous dominant offspring of green peas (dominant G) to yellow peas (recessive g)?

Back

Gg

Front

In Mendel's pea plants, the homozygous recessive phenotype was white flowers. If Mendel crossed two homozygous recessive pea plants, what color flowers would be seen in the offspring?

Back

white

Front

What percentage of the offspring will be purebred dominant?

Back

25%