Flashcardizz - Heredity Test Review

Front

The form of a gene that is always expressed if present is the _____ form.

Back

dominant

Front

Two heterozygous purple-flowering pea plants are crossed. If purple is dominant over white, what are the expected phenotypic results?

Back

75% purple, 25% white.

Front

What law BEST explains why an organism with ‘Tt’ will show only the dominant phenotype?

Back

Law of Dominance

Front

If an organism inherits one dominant allele and one recessive allele for eye color, their genotype would be: haploid, homozygous, heterozygous, homologous

Back

heterozygous

Front

Two parents have the genotype Gg for a genetic disorder caused by a recessive allele. What is the chance that any of their children will inherit the disorder?

Back

25%

Front

Which Mendelian law of inheritance states that organisms inherit two copies of each gene and donate one copy to each of their offspring?

Back

Law of Segregation

Front

In pigs, the allele for a wavy, rough coat (R) is dominant to the allele for a soft, fine coat (r). A rough coat boar and a soft coat sow mate. They produce several litters, 50% are rough coat and 50% are smooth coat. What must be the genotypes of the parents to create this phenotypic ratio?

Back

Rr × rr

Front

Imagine two heterozygous parents. Each has a dominant allele (B) for brown eyes and a recessive allele (b) for blue eyes. What would the genotypic ratio of the offspring be?

Back

25% BB, 50% Bb, 25% bb

Front

Identify the following genotype as homozygous or heterozygous: TT

Back

Homozygous

Front

Identify the genotype Tt as homozygous or heterozygous:

Back

Heterozygous