Exam 3: Transmission of Genes from Generation to Generation

In crosses involving complete dominance,the F2 genotypic ratio is 1:2:1 and is expressed as a phenotypic ____________________ ratio (express as x:x).

Incomplete dominance is the expression of a phenotype that is intermediate to those of the parents.

In Mendel's pea plant experiment,the trait of pea shape was represented by the two variations ____________________ and ____________________.

Mendel selected pea plants for his experiments because ____.

Define Ockham's razor and provide an example.

Chi-square tests are used to determine whether a cross has been correctly constructed and analyzed.

People with albinism carry two copies of the dominant allele (AA)and cannot make a pigment called melanin.

In a monohybrid cross with complete dominance,the F2 offspring should contain ____.

The first genetic trait described in humans was ____.

In humans,the gene for blood type has ____________________ (number)alleles and the A and B alleles are ____________________.

In humans,hair texture is an incompletely dominant trait.Curly is the dominant genotype,wavy is heterozygous,and straight hair is recessive.What is the probable phenotypic ratio for a cross between a man with wavy hair and a woman with curly hair?

When two traits are analyzed separately,then the frequencies of each are combined to yield the observed phenotypic ratios,this confirms the principle of ____________________.

People with albinism carry two copies of the ____________________ allele (aa)and cannot make a pigment called ____________________ which is the principal pigment in skin,hair and eye color.

Why is it unethical to use humans in experimental genetics? Explain your reasoning.

Explain how Mendel compensated for the fact that he was unable to analyze mathematically how well the observed outcome of his cross fulfilled his predictions.

Although phenotypes may not follow predicted ratios,genotypes do obey the principles of ____________________.

In his monohybrid crosses,Mendel deduced that one trait was recessive because that trait was ____.

When analyzing a cross involving two traits,each trait is analyzed separately,and then the frequencies of each are combined to yield the observed phenotypic ratios.

In spite of the benefits offered by genetic screening for newborns,critics charge that patients' ____________________ rights are violated because the programs are mandatory.

Pedigree construction can be a difficult task.