Exam 12: Patterns of Inheritance

Height is a trait that shows continuous variation in humans.In pea plants,on the other hand,the tall allele is dominant over the short allele and there are no intermediate heights.What is the best explanation for this difference?

In rabbits,there is a gene that controls ear length,with a dominant allele "T" for long ears and a recessive allele "t" for short ears.At another gene locus,there are alleles "B" for black coat and "W" for white coat.Neither the B or W allele is dominant,and BW produces a gray coat.These two allele pairs assort independently.If a gray rabbit that is heterozygous at the gene locus controlling ear length is mated with a white rabbit that is also heterozygous at the gene locus controlling ear length,what proportion of the long-eared offspring will be homozygous for the long-eared trait?

Sometimes,one gene pair will interfere with the expression of a second gene pair in an interaction called

Mendel demonstrated which of the following about inherited traits? Check all that apply.

Mendel used the ________ to determine whether an individual with the dominant phenotype was homozygous or heterozygous for that trait.

Mendel's Principle of Independent Assortment states that different pairs of

Consider the cross AaBbCcddEe X AABBccDDEe.If these 5 allele pairs all assort independently,then the probability that any individual offspring will have the genotype AABBccDdEe is 1 out of

Before Mendel's experiments with pea plants,which ideas formed the basis for most thinking about heredity? Check all that apply.

A diploid organism that has two identical alleles for a given trait is called ________ for that trait.

If you are tossing a six-sided die,what is the probability of getting either a 1 or a 2 on your first toss AND a 1 or a 2 on your second toss?

An extensive study was conducted on identical twins who were separated at birth.Among other things,the study showed that the individual from each pair who received better nutrition during childhood tended to score higher on standardized intelligence tests.This can best be described as an example of how

Three babies were recently mixed up in a hospital.Based on the data in the table above,the couple with blood types A and B are the actual parents of the child with blood type

Let P = purple flowers and p = white,and T = tall plants and t = dwarf.If the uppercase letters represent the dominant alleles,what is the phenotype of a plant with the genotype PpTt?

Pedigrees are useful to geneticists because they can help determine: Check all that apply.

The observable expression of the genes present is called

Achondroplasia is a common form of dwarfism caused by an autosomal dominant mutation in the fibroblast growth factor receptor 3 (FGFR3)gene.Two copies of the mutant gene are invariably fatal before or shortly after birth.If a person with achondroplasia marries a person of normal height,what is the probability that both their first child and second child will have achondroplasia?

The Principle of ________ states that the 2 alleles present at each gene locus separate from one another during gamete formation and remain distinct.

What type of cross is used to determine if an individual with the dominant form of a trait is homozygous or heterozygous?

In modern terminology,Mendel's heredity "factors" are called

A cross where we follow the inheritance of 2 pairs of alleles is called