# Chapter 11 Mendel and the Gene Idea

5.0 (2 reviews)
What do we mean when we use the term monohybrid cross?
A) A monohybrid cross involves a single parent.
B) A monohybrid cross produces a single offspring.
C) A monohybrid cross involves organisms that are heterozygous for one character.
D) A monohybrid cross is performed for one generation.
E) A monohybrid cross results in a 9:3:3:1 phenotype ratio in the F2 offspring.
Click the card to flip 👆
1 / 31
Terms in this set (31)
What do we mean when we use the term monohybrid cross?
A) A monohybrid cross involves a single parent.
B) A monohybrid cross produces a single offspring.
C) A monohybrid cross involves organisms that are heterozygous for one character.
D) A monohybrid cross is performed for one generation.
E) A monohybrid cross results in a 9:3:3:1 phenotype ratio in the F2 offspring.
What do we mean when we use the term dihybrid cross?
A) A dihybrid cross involves two parents.
B) A dihybrid cross produces two offspring.
C) A dihybrid cross involves organisms that are heterozygous for two characters.
D) A dihybrid cross is performed for two generations.
E) A dihybrid cross results in a 3:1 phenotype ratio in the F2 offspring.
What was the most significant conclusion that Gregor Mendel drew from his experiments with pea plants?
A) There is considerable genetic variation in garden peas.
B) Traits are inherited in discrete units, and are not the results of the "blending" of traits.
C) Recessive genes occur more frequently in the F1 generation than do dominant ones.
D) Genes are composed of DNA.
E) An organism that is homozygous for many recessive traits is at a disadvantage.
Which of the following statements describes the major reason that the individual with the genotype AaBbCCDdEE can make many kinds of gametes?
A) segregation of maternal and paternal alleles
B) crossing over during prophase I
C) different possible assortment of chromosomes into gametes
D) the tendency for dominant alleles to segregate together
Why did Mendel continue some of his experiments to the F2 generation?
A) to obtain a larger number of offspring on which to base statistics
B) to observe whether or not a recessive trait would reappear
C) to observe whether or not the dominant trait would reappear
D) to distinguish which alleles were segregating
Which of the following statements describes one difference between the law of independent assortment and the law of segregation?
A) The law of independent assortment explains the segregation of two or more genes relative to one another.
B) The law of segregation explains the segregation of two or more genes relative to one another.
C) The law of segregation requires having two or more generations to describe.
D) The law of segregation is accounted for by anaphase of mitosis.
Two plants are crossed, resulting in offspring with a 3:1 ratio for a particular trait. What does this suggest?
A) that the parents were true-breeding for contrasting traits
B) that the trait shows incomplete dominance
C) that a blending of traits has occurred
D) that the parents were both heterozygous for a single trait
E) that each offspring has the same alleles for each of two traits