chapter 11 review answers 1

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Chapter 11 - Genetics & Meiosis Review Questions (w/ Answers)
Modified True/False
Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true.
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1. A trait is a specific characteristic that varies from one individual to another. _________________________

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2. Gregor Mendel concluded that the tall plants in the P generation passed the factor for tallness to the F1 generation. _________________________

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3. An organism with a dominant allele for a particular form of a trait will sometimes show that trait.
_________________________

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4. True-breeding plants that produced axial flowers were crossed with true-breeding plants that produced terminal flowers. The
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The relative locations of each known gene can be shown on a ____________________ map.
Short Answer

29. Define genetics.
30. What attributes of the garden pea plant made it an excellent organism for Gregor Mendel’s genetic studies?
31. What might have caused Gregor Mendel NOT to conclude that biological inheritance is determined by factors that are passed from one generation to the next?
32. How many recessive alleles for a trait must an organism inherit in order to show that trait?
RrYy
RY

Ry

rY

ry

RY

RRYY

RRYy

RrYY

RrYy

Ry

RRYy

RRyy

RrYy

Rryy

RrYy rY RrYY

RrYy

rrYY

rrYy

ry

RrYy

Rryy

rrYy

rryy

Seed Shape
R – round r – wrinkled

Seed Color
Y – yellow y – green

Figure 11-2
33. What is the phenotype ratio of the offspring in the Punnett square shown in Figure 11-2?
34. A pea plant heterozygous for height and seed color (TtYy) is crossed with a pea plant heterozygous for height but homozygous recessive for seed color (Ttyy). If 80 offspring are produced, how many are expected to be tall and have yellow seeds?
35. What might happen if the gametes of a species had the same number of chromosomes as the species’ body cells? 36. How many sets of chromosomes are in a diploid cell?
37. Define homologous chromosomes.
38. What happens to the number of chromosomes per cell during meiosis?
39. Contrast the cells produced by mitosis with those produced by meiosis.

Chapter 11 - Genetics & Meiosis
Answer Section
MODIFIED TRUE/FALSE
1. ANS: T
2. ANS: T
3. ANS:
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