Chapter 1: The Mendelian View of the World

Question 1

Published molecular structure of nucleic acid that proposed double helical structure

Answer 1

James watson and Francis crick

Question 2

Studied the transmission of heredity from one generation to another

Answer 2

Gregor mendel

Question 3

This experiment illustrates the behavior of each pair of differing traits in a hybrid association is independent of all other differences in the two parental plants

Answer 3

Mendels “Experiments in plant hybridization”

Question 4

Alternate forms of a gene pair that control a characteristic

Answer 4

Alleles

Question 5

RR, rr, YY, yy

Answer 5

Homozygous

Question 6

Rr, Yy

Answer 6

Heterozygous

Question 7

R and Y

Answer 7

Dominant

Question 8

r and y

Answer 8

Recessive

Question 9

Bred True

Answer 9

Produces progeny with a characteristic identical to the parental strains

Question 10

F1 x F1

Answer 10

F2 generation

Question 11

True breeding parents are crossed to produce

Answer 11

F1 generation

Question 12

3:1 phenotypic ratio and 1:2:1: genotypic ratio

Answer 12

F2 generation

Question 13

Incomplete dominance

Answer 13

Neither dominant nor recessive. Mixes well

Red x White = Pink

Question 14

Snap dragons flowers are an example of …

Answer 14

incomplete dominance

Question 15

Co dominance

Answer 15

Neither allele is dominant over the other. No intermediate phenotype. Does not mix well
Red x White = Red/white

Question 16

When one gene modifies another

Answer 16

Epistasis

Question 17

Traits controlled by two or more genes

Answer 17

polygenic

Question 18

What reproduction process produces daughter calls (2n –> 2n)

Answer 18

Mitosis

Question 19

What reproduction process produces gametes (2n –> 1n)

Answer 19

Meiosis

Question 20

Crossing over occurs in

Answer 20

meiosis I

Question 21

1. Genes located on separate chromosomes

2. Genes are far apart on same chromosome

Answer 21

Two rules of Independent Assortment

Question 22

Genotype

Answer 22

Actual genes

Question 23

Diploid

Answer 23

2n = 46 chromosomes

Question 24

Haploid

Answer 24

n = 23 chromosomes

Question 25

Segregation

Answer 25

Separation of two alleles

Question 26

Independent assortment

Answer 26

Independent sorting of two different traits

Question 27

This event between two traits restores the original phenotype, resulting in a non-recombinant offspring

Answer 27

Double crossover

Question 28

What can be performed to determine gene order

Answer 28

a single three-factor cross

Question 29

Which gene is in the middle of the double cross over? - 675 ABC, abc - 25 abC,ABc - 75 AbC, aBc - 225 Abc, aBC

Answer 29

C

Question 30

Multiple traits can be used to determine relative positions of genes on a ____________

Answer 30

Genetic map (linkage map)

Question 31

1 cM = __ % chance of crossing over

Answer 31

1

Question 32

Recombination frequency of 28% means

Answer 32

C. They are linked on the same chromosome

Question 33

One gene pair sorts independently of another gene pair

Answer 33

Independent assortment

Question 34

Law of Segregation

Answer 34

Genes occur in pairs (allelles) and at the time of gamete formation, one of each pair enters the gametes. Half the gametes carry one allele, the other half the other allele

Question 35

Law of Independent assortment

Answer 35

Genes for different traits assort independently of one another in the formation of gametes

Question 36

Principle of Dominance

Answer 36

Some alleles are dominant while others are recessive, and an organism with at least one dominant allele have the dominant phenotype

Question 37

True or False: | Independent assortment of two traits shows a F2 generation that has a 9:3:3:1 phenotypic ratio

Answer 37

TRUE

Question 38

True or False: | Allele pairs never segregate

Answer 38

FALSE

Question 39

True or False: The principle of segregation states that genes for different traits assort independently of one another in the formation of gametes

Answer 39

FALSE

Question 40

AaBbcc x AabbCC, probability for aaBbCc

Answer 40

1/4 x 1/2 x 1 = 1/8

Question 41

From an RrYy x RrYy cross, calculate the probability for genotype RRYy

Answer 41

1/4 x 1/2 = 1/8

Question 42

Sex linkage

Answer 42

Genes linked to chromosomes

Question 43

True or false: Regarding McClintock's and Creighton's experiment with corn, the dominant phenotype could only appear as a result of crossing over

Answer 43

FALSE | The RECESSIVE phenotype could only appear as a result of crossing over