Exam 11: The First Geneticist: Mendel and His Discoveries

Refer to the figure below, and then answer the question that follows. -In his basic experiments,Mendel began with true-breeding parental (P)plants.What results did he see when he cross-fertilized P generation plants that had different traits?

Height is an example a character that displays continuous variation in humans.What is the reason for the range of heights in humans?

Identical twins are genetically the same but do not always look or act exactly alike.Propose a hypothesis to explain this.

A person with the genotype Iᴬᴵᴮ has type AB blood.This is an example of:

If all of Mendel's monohybrid crosses had involved traits that function by incomplete dominance,would his results have supported blending inheritance?

Mendel's work was presented in ________ but not recognized and rediscovered until ________.

Which of the following was not one of Mendel's main inferences from his research?

A and a are dominant and recessive alleles,respectively,of the same gene.Which genotype(s)would result in an individual with the recessive phenotype?

Let S = smooth pea and s = wrinkled pea; Y = yellow pea and y = green pea.What are the different possible genotypes of the gametes produced by a plant that is heterozygous for both characters?

Mendel's contribution to genetics was the discovery of DNA.

A particular quality of an organism is referred to as a ________,each variation of which is a particular ________.

A and a are dominant and recessive alleles,respectively,of the same gene.Which genotype(s)would result in an individual with the dominant phenotype?

Let S = smooth pea and s = wrinkled pea; Y = yellow pea and y = green pea.What pea phenotype would be produced by the genotype SsYy?

In order to track the inheritance of two characters,you would need to do a:

The Law of Segregation states that:

In humans,freckles are dominant to no freckles,and unattached earlobes are dominant to attached earlobes.Two individuals who both have freckles and unattached earlobes have a child with no freckles and attached earlobes.What are the genotypes of the parents? (F = freckles; E = unattached earlobes)

In a breeding experiment with yellow and green true-breeding parents,Mendel took yellow seeds from his F₂ generation,planted them,and self-pollinated the flowers to produce an F₃ generation.He saw that some produced all yellow seeds,and some produced a mix of yellow and green seeds.How can these results be explained?

In Mendel's pea plant experiments,in order for him to have observed a 3:1 phenotypic ratio in the F₂ generation,which of the following must be true?

Cystic fibrosis (CF)is a disease caused by a recessive allele,and the disease appears only in the homozygous recessive genotype.Two parents do not have cystic fibrosis,but they produce a child with this disorder.Fully explain what has occurred,using the appropriate terminology and diagram (you must provide this diagram).

If an individual has genotype AaBb,how many different gametes can he or she produce? What combinations of alleles are possible?