Lab 2

Question 1

monohybrid cross with genotype and phenotype

Answer 1

cross 1 trait
Genotype: 1:2:1
Phenotype: 3:1

Question 2

Dihybrid cross, what does it show, and phenotype

Answer 2

2 traits cross
shows independent assortment because alleles independently assort themselves into different gametes
9:3:3:1

Question 3

How many different gamete genotypes can each organism produce for the cross AaBbCC X AABbCc

Answer 3

both create 4 gamete genotypes

Question 4

AaBbCC X AABbCc predict ratio of phenotypes

Answer 4

1:1:2:2:1:1:1:1:2:1:1:1

Question 5

The cross AaBb x aabb is called

Answer 5

testcross

Question 6

Test Cross

Answer 6

cross of organism with unknown dominant genotype with organism that is homozygous recessive

Question 7

Assuming codominance for both genes what is the phenotypic ration of the offspring of the cross AaBb x AaBb

Answer 7

1:2:1:2:4:2:1:2:1

Question 8

Codominant

Answer 8

2 or molle alleles that are equally dominant

Question 9

Assuming complete dominance what is the phenotypic ratio of the offspring of the cross AaBb x aabb

Answer 9

1:1:1:1

Question 10

Full pod shape (F) is dominant to constricted pod shape (f) and yellow pod color (Y) is dominant to green pod color (y) in pea plants. A pure breading green plant with full pods is crossed with a pure breeding yellow plant with constricted pods. The offspring are then testcrossed. What is the expected phenotypic ratio of offspring?

Answer 10

1:1:1:1

Question 11

incomplete dominance

Answer 11

2 dominant alleles

Question 12

Corn has color gene and height gene with the following phenotypes: CC and Cc, purple, cc, white; tall, TT, medium, Tt, dwarf tt. If a dihybrid is self fertilized what is the resulting phenotypic ratio?

Answer 12

3:6:3:1:2:1

Question 13

Full pod shape( F) is dominant to constricted pod shape (f), and yellow pod color (Y) is dominant to green pod color (y) in pea plants. What is the genotype of a yellow plant with a constricted pod?

Answer 13

ffYY

Question 14

In a monohybrid cross between 2 true breeding parents the both exhibit dominant phenotype. What % of the offspring will exhibit the recessive phenotype.

Answer 14

0%

Question 15

Organisms with the genotypes AABbCcDd and AaBbCcDd are crossed. what are the expected proportions of the following?
- A_B_C_D_
-AabbCcDd
-phenotype identical to either parent
- A_B_ccdd

Answer 15

.42
.03
.42
.05

Question 16

Chi square (x^2) test

Answer 16

Stat test used to see if observed values for a set of data are similar from expected values

Question 17

What is the Chi square value if observed 50 purple corn and 19 yellow corn

Answer 17

.236

Question 18

Null hyposthesis

Answer 18

no significant difference between observed and expected data and our observed data following Mendel 3:1 phenotypic ratio for kernel color