Exam 9: Patterns of Inheritance

When two alleles of the same gene are different, the individual carrying those alleles is said to be ____.

Human eye color is an example of a trait that varies ____.

Purple flower ( A )is dominant over white flower ( a ), and tall stem ( B )is dominant over short stem ( b ). The Punnett square represents a cross between two dihybrids ( AaBb   ´   AaBb ). In the figure above, what would be the genotype of plant #7?

In the Bombay phenotype, a gene in the recessive condition blocks the expression of A and B red blood cell antigens. Thus, all A, B, and AB genotypes are expressed as the O phenotype. This is an example of ____.

An allele is ____ if its effect masks that of a ____ allele paired with it.

An autosomal recessive disorder ____.

In a cross of a DDRR individual with a ddrr individual, the genotype of all offspring will ____.

In Siamese cats, enzymes that code for dark fur color are only active in cooler temperatures. Thus, the tips of a Siamese cat's ears, feet, and tail are dark but not the warmer regions of its body core. This is an example of ____.

In a person with cystic fibrosis, the CFTR mutation causes the protein to be ____.

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is ____.

____ is an example of a genetic disorder with little impact on the individual.

If a pure-breeding wired-hair terrier ( WW )is crossed with a pure-breeding smooth-hair terrier (ww), and a puppy with a wavy hair is produced, the simplest explanation is ____.

Amniocentesis involves sampling ____.

The switching between asexual and sexual reproduction by water fleas is controlled by ____.