Exam 9: Patterns Of Inheritance

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 ____.

An individual's ____ determines its observable ____.

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

Match the following terms to the description with which they best correspond. -condition in which one allele is not fully dominant over another; the heterozygous phenotype appears to be a blend of the two homozygous phenotypes

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

Match the following terms to the description with which they best correspond. -refers to two alleles that are both fully expressed in heterozygous individuals

If a child has an AB blood type,____.

Males are more commonly affected by X-linked recessive genetic disorders than females because ____.

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

Match the following terms to the disorder to which it corresponds. -sickle-cell anemia

The mutated gene that causes cystic fibrosis is ____.

  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,how many plants would have purple flowers and tall stems?

Narrative: Achondroplasia,a hereditary form of dwarfism,is an autosomal dominant disorder; however homozygous dominant individuals either die before birth or very shortly thereafter.The homozygous recessive condition is normal.A dwarf couple decide to have children.Use this information to answer the following question: Of the children of this couple who survive,what is probability that they will be affected by achondroplasia?

Match the following symptoms to the disorder to which they correspond. -Down syndrome

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,how many plants would have white flowers and short stems?

In codominance,____.

In cats,short hair (L)is dominant to long hair (l).If a short-haired cat of unknown genotype is crossed with a long-haired animal,and they produce one long-haired kitten and one short-haired kitten,this would indicate that ____.

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

In an autosomal dominant disorder such as Huntington's disease,two carrier parents have the probability of passing the gene onto ____ percent of their children.

Match the following symptoms to the disorder to which they correspond. -XYY syndrome