Qualitative and Quantitative Traits

Question 1

trait that fits into discrete categories

Answer 1

qualitative traits

Question 2

one state or the other

Answer 2

qualitative traits

Question 3

mostly are governed by one (or few) genes with different alleles

Answer 3

qualitative traits

Question 4

Other term for qualitative traits

Answer 4

discontinuous traits

Question 5

occurs in more complex organisms (higher eukaryotes)

Answer 5

quantitative traits

Question 6

traits expressed across a wide spectrum of phenotyoes

Answer 6

quantitative traits

Question 7

these are traits that needs to be measured such as height, weight, plant yield, milk production

Answer 7

quantitative traits

Question 8

governed by many genes with multiple loci

Answer 8

quantitative traits

Question 9

it is influenced by environment

Answer 9

quantitative traits

Question 10

it is called continuous traits

Answer 10

quantitative traits

Question 11

genes that contribute to a quantitative trait

Answer 11

quantitative trait loci

Question 12

most are protein coding but can be other DNA elements

Answer 12

Quantitative Trait loci

Question 13

trait that is influenced by the DNA and environment

Answer 13

multifactorial trait

Question 14

one genotype : one phenotype

Answer 14

simple mendelian genetics

Question 15

a single genotype can be used to predict a qualitative phenotype

Answer 15

simple mendelian genetics

Question 16

genotype can be predicted using the contrasting phenotype

Answer 16

simple mendelian genetics

Question 17

multiple genotypes can give the same phenotype

Answer 17

polygenic traits

Question 18

seeing the phenotype doesn’t allow you to infer genotype

Answer 18

quantitative genetics

Question 19

he suggested that continuous traits be due to multiple genes, each gene producing a small effect on the measured character

Answer 19

Udny Yule

Question 20

he demonstrated this on the grain color of wheat

Answer 20

Nilsson-Ehle

Question 21

categorized the colors of the hulls in the F2 generation and discovered that they followed a 1:4:6:4:1 ratio

Answer 21

Nilsson-Ehle

Question 22

What is the ratio of the F2 generation of the colors of the hulls according to Nilsson-Ehle?

Answer 22

1:4:6:4:1

Question 23

True or False: As the number of independently segregating genes increased, the distribution approaches a normal curve.

Answer 23

True

Question 24

True or False: As the number of independently segregating genes decreased, the distribution approaches a normal curve

Answer 24

False

Question 25

What is the mathematical rule needed to be used to determine the number of phenotypes based on the number of genes?

Answer 25

(n x 2) + 1

Question 26

How to determine the extreme phenotype?

Answer 26

(1/4)^n

Question 27

genes that can supplement one another to produce observable quantitative changes

Answer 27

polygenes

Question 28

they can be added to produce phenotypes

Answer 28

additive

Question 29

What are some assumptions for polygene hypothesis?

Answer 29

Genes are independent of one another. Genes have cumulative effect. Dominance is ordinarily absent. Expression of the trait is affected by the environment. Can only be classified through measurement of a recognizable unit.