Chapter 7: Concepts of Bio Midterm

A thoroughbred racehorse could have at most ________ alleles of the same gene.

2

Consider a gene with two alleles that show complete dominance. When two heterozygotes for this gene breed, they have a 25% chance of producing a homozygous recessive offspring. The next time these two individuals breed what are the chances they will have a homo recessive?

25%

A pea plant that is heterozygous for the flower color gene makes gametes. What is the probability that a specific gamete contains a recessive allele for flower color?

50%

You create hybrids by mating your radioactive DD individual to dd individuals. You cross two f1 generations with Dd, 1000 offspring's, how many will be radioactive?

750

An allele is?

A version of a genotype.

Which of the following choices represents the genotype of an individual diploid organism?

BbCCdd

The 9:3:3:1 ratio of phenotypes that occur in the f2 generation of the cross shown can be explained using?

Both of Mendel's laws of genetic inheritance

Which of the following did Mendel use to help him form the law of independent assortment?

Dihybrid crosses between pea plants

In Mendel's controlled mating experiments the individuals produced by crossing two-true-breeding parents are referred to as?

F1 generation

In the Puneet square below, the lettered circles on the top left represent? RY RY Ry Ry

Gametes that may be produced by each parent involved in the cross

Mendel used ____ as his research organism to study patterns of genetic inheritance

Garden peas

Which of the following statements regarding genes is not true?

In sexually reproducing species, each cell contains a single copy of every gene.

When Mendel proposed the law of segregation, which of the following pieces of information did he not have?

Knowledgeable location of the alleles that control flower color

Mendel's laws of segregation and independence assortment both have their biological basis in events that take place during?

Meiosis

Which of the following is true for mutations?

Mutations will affect the genotype, which may affect the phenotype.

In the genetic cross of Gg with Gg guinea pigs, none of the four offspring were gg. This?

Neither supports nor disapproves Mendel's law of independent assortment

Would it be necessary to have both the genotype and phenotype of an organism if you are attempting to predict the inheritance pattern a trait, such as hair color, in offspring?

No, knowing the genotype will indicate the phenotype.

Which of the following did Gregor Mendel notice in garden peas?

Some plants always produced offspring with flowers that were the same color as the parent plant's flowers

which of the following does not represent a phenotype?

The alleles in a mouse that control hair color.

The figure shown illustrates Pp-> P p

The law of segregation

Why did Mendel analyze thousands of plants while conducting his research?

The likelihood of seeing a clear pattern is higher with a larger set of data

Which of the following statements is a basic summary of one of Mendel's laws?

The separation of alleles for one gene does not affect the separation of alleles for other genes

Which of the following is the mechanism described by Mendel that results in a new combination of alleles in a pea plant seed?

The separation of alleles for two different genes during meiosis

If you compare a sperm cell in a human to a skin cell from the same individual, which of the following differences would you expect to find?

The sperm cells would contain only one allele for a given gene, the skin cells would contain 2 alleles.

Two organisms that are true-breeding for a certain genetic characteristic are mated, and their offspring's analyzed. Which of the following statements about this situation is true?

They are either 100% homozygous or 100% heterozygous

Which of the following statements is true of Mendel's laws

They correctly explain how genes are inherited.

A Punnett square is used to

To predict the outcome of a genetic cross

Mendel's manuscript is considered one of the two most important scientific papers, because he was the first to explain how?

Traits are passed from one generation to the next

Which of the following expresses Mendel's law of segregation

Two alleles of a gene separate during meiosis and end up in different gametes

which of the following statements is not true?

Two organisms with the same genotype are homozygous.