Exam 29: Heredity

Albinism is a good example of a(n)________ trait.

The main way a recessive allele would be expressed even when only one copy is present would be ________.

An allele that completely masks the expression of the other alleles is called ________.

Steven has the dominant tongue rolling phenotype but he does not know his genotype.His wife has the recessive non-tongue rolling trait.If their son can roll his tongue this means ________.

Figure 29.1 -Given the information in Figure 29.1,what would the genotype ratio be for the offspring?

A dominant allele is best defined as ________.

Match the following: -A condition of drier excessively sticky mucus production.

Figure 29.1 -Given the information in Figure 29.1,what would be the genotype of the offspring designated by the blank square?

An individual who is heterozygous for a particular trait,yet expresses both alleles of that trait,is an example of ________.

What is (are)the phenotype(s)of the first-generation offspring?

Normal vision is dictated by autosomal dominant genes.

Delayed action genes can result in fatal diseases.

Match the following: -The heterozygote has a phenotype intermediate between those of the homozygous dominant and homozygous recessive.

Figure 29.2 Use Figure 29.2 to answer the following: -Is the trait sex-linked?

The 23rd pair of human chromosomes are called ________ chromosomes.

Match the following: -Rare type of dwarfism resulting from an impaired ability of the fetus to lengthen long bones by endochondrial ossification.

Small RNAs control the timing of programmed cell death during development.

Figure 29.1 -Given the information in Figure 29.1,if C were an incomplete dominant trait,what would the phenotype ratio be for the offspring?

It is possible for a baby to have type O blood if neither parent is type O.

Removing a sample of the fluid surrounding the fetus for the purpose of studying the chromosomes is a procedure called ________.