Exam 12: Patterns of Inheritance

A genotype is always expressed in the phenotype.

An individual with the genotype Aa mates with an individual with the genotype AA. Which of the following is true?

We need a hammer to pound nails into a board. Even if we have the nails, we cannot pound them without first getting hold of a hammer. This is similar to the genetic relationship known as

A genetic ____________________ is a controlled mating experiment used to examine the inheritance of a particular gene.

Most traits are under the control of more than one gene.

If the D allele is completely dominant over the d allele, what percentage of the offspring will have the dominant phenotype when two heterozygous individuals mate?

Suppose D were dominant and d were recessive, and you could label the D allele in the P generation with a radioactive substance that could be inherited over several generations. You create hybrids by mating your radioactive DD individuals to dd individuals. Finally, you cross two Dd individuals. In 1,000 offspring, how many would you predict would be radioactive?

Mendel's hypotheses regarding inheritance in peas were generally accepted when he published them in 1865.

If an offspring has a total of 32 genes, it inherited ____________________ genes from each parent.

When a ____________________ variety of a plant is self-fertilized, all of its offspring have the same phenotype as the parent.

The lettered fragment indicated by the black arrow in the image below is the part of a chromosome responsible for producing ____________________ that ultimately determine the phenotypes of an individual.

Mendel's manuscript discussing his pea-breeding results is considered one of the two most important scientific papers of the nineteenth century because he was the first to explain how

The black arrow in the image below indicates the biological unit of inheritance. These structures contain a(n)

Temperature can affect phenotype.

One of the first medical tests a newborn receives determines if the child has phenylketonuria (PKU). PKU is the result of a mutation in a single gene that causes mental retardation and a host of other phenotypes (light hair and skin color, eczema, and a "mousy" smell). By detecting PKU early, doctors are able to reduce the effect of this condition with a modified diet. PKU is an example of

In the Punnett square shown below, the lettered circles on the top and left of the square (indicated by the arrows)represent the

Cystic fibrosis is caused by a recessive gene. If C = normal and c = cystic fibrosis, how can a child with cystic fibrosis have two parents who do not have cystic fibrosis?

A tall plant mates with itself and produces all tall offspring. This cross is repeated for many generations with the same results. The parental plant is most likely

Which of the following statements is true?

The figure below shows three generations in one of Mendel's experiments and demonstrates that purple flower color is dominant over white flower color in peas. Which of the following is the best rationale for this conclusion?