Genetics and Inheritance Concepts

Which of the following is NOT true regarding the particulate theory of inheritance?

• It preceded Mendel's research by a century.

• It was proposed by Mendel.

• It is based on particles or hereditary units we now call genes.

• Mendel developed the theory based on his research on pea plants.

What is the blending theory of inheritance?

• A theory that describes how offspring show traits intermediate between those of the parents.

• Mendel's theory of how traits are passed from parent to offspring.

• Darwin's theory of how traits are passed from the parent to the offspring.

• The modern theory of how genetic information is passed from parents to offspring.

Which of the following statements do NOT describe Gregor Mendel?

• He had a strong background in mathematics.

• He neglected to collect quantitative data from his experiments.

• He was very deliberate and followed the scientific method closely while doing his research.

• He conducted many preliminary studies with various animals and plants.

• He kept very detailed records of his research.

If a pea plant shows a recessive phenotype,

• the genotype can only be TT.

• the genotype may be TT, Tt, or tt.

• the genotype can only be tt.

• the genotype may be Tt or tt.

• the genotype may be TT or Tt.

Which of the following is NOT true regarding a Punnett square?

• All the possible types of sperm are lined up either horizontally or vertically.

• All the possible types of eggs are lined up either horizontally or vertically.

• The results show the offspring's expected genotypes.

• The results will tell the exact numbers of offspring with each genotype.

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.

• All children must have unattached earlobes since both parents possess the dominant gene for it.

• The children must repeat the grandparents' genotype (Ee).

• If the first three are heterozygous, the fourth must be homozygous recessive.

• Two heterozygous, one homozygous recessive, and one homozygous dominant is a likely outcome, but all

  heterozygous, or two, three, or all four homozygous are also possible.

• They can be certain that three will be heterozygous and one homozygous recessive.

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

• 1/4

• 3/4.

• 1/2.

• 1 or absolute certainty.

• 3/16.

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?

• About one-fourth will be green and three-fourths white.

• All will be white and lack chlorophyll.

• About one-half will be green and one-half white.

• About one-fourth will be white and three-fourths green.

• All will be green with chlorophyll.

If an individual with a dominant phenotype is crossed with an individual with a recessive phenotype, 4 of their 9 offspring show the recessive phenotype. What is the genotype of the first parent?

• Aa

• aa

• The answer cannot be determined from this information.

• AA

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

• none

• Testcross

• Monohybrid cross
• Dihybrid cross