Exam 11: Mendelian Patterns of Inheritance

The offspring of a monohybrid testcross could have what possible genotype(s)?

Which of the following crosses will NOT produce offspring with the recessive phenotype? Select all that apply.

If white eyes are produced by a recessive allele,what is the likely genotype of a white-eyed individual?

If a human who is a tongue roller (T)and has unattached ear lobes (E)marries a person who cannot roll their tongue and has attached earlobes,could they produce an offspring that was also a non-tongue-roller with attached earlobes? What would be the genotype of the first parent? The second parent?

If black fur is produced by a recessive allele,which genotype is most likely to produce a black individual?

If individuals exhibiting a dominant phenotype are crossed and produce only offspring with the dominant phenotype,which of the following could be the genotype of the parents?

As many as 60% of people in malaria-infected regions of Africa have the sickle-cell allele,but only about 10% of the U.S.population of African ancestry carries the allele.Malaria remains a major disease in central Africa but has not been a serious problem in the U.S.for many generations.What is/are the reason(s)for the difference in the percentages and what is a reasonable statement about future percentages?

Black and brown guinea pigs are bred together.Assuming their color is determined by one gene,and that there is a dominant and a recessive allele,how would you determine which allele is dominant? How could you determine the genotypes of the parents? Explain.

Haiti is settled by peoples of both African and European ancestry.A young couple,both with mixed ancestry,marry and have several children.The children,who all have equal exposure to sunlight,vary widely in the amount of skin melanin.One child is lighter than both parents,and one is darker.The simple explanation for this is

Create a pedigree chart that depicts an inheritance pattern of an autosomal dominant characteristic.Use circles to depict females and squares to depict males.Colored shapes represent affected individuals (expressing a trait)and uncolored shapes are unaffected (do not express a trait).

The ability to roll the edges of the tongue upward in a U-shape is considered to be an inherited trait.The standard assumption is that tongue-rolling is a dominant allele at a single gene locus.Which of the following would cast doubt on this assumption? Select all that apply.

If two parents have blood genotypes I^Ai and I^Bi,which of the following blood genotypes are possible in their children?

What aspect of Mendel's background gave him the necessary tools to discover the laws of inheritance?

What is pleiotropy?

The particulate theory of inheritance

In what kind of classic Mendelian cross would you expect to find a ratio of 9:3:3:1 among the F₂ offspring?

Unattached earlobes (EE or Ee)are described in the textbook as dominant over attached earlobes (ee).A couple both have unattached earlobes.Both notice that one of their parents on both sides has attached earlobes (ee).Therefore,they correctly assume that they are carriers for attached earlobes (Ee).The couple proceeds to have four children.

Which allele combination represents a heterozygous individual?

Some plants fail to produce chlorophyll,and this trait appears to be recessive.Many plants also self-pollinate.If we locate a pea plant that is heterozygous for this trait,self-pollinate it and harvest seeds,what are the likely phenotypes of these seeds when they germinate?

If the probability of event A is 3/4 and the probability of event B is 1/4,then the probability of both A and B occurring at the same time is