Lab 2 Flashcards
monohybrid cross with genotype and phenotype
cross 1 trait
Genotype: 1:2:1
Phenotype: 3:1
Dihybrid cross, what does it show, and phenotype
2 traits cross
shows independent assortment because alleles independently assort themselves into different gametes
9:3:3:1
How many different gamete genotypes can each organism produce for the cross AaBbCC X AABbCc
both create 4 gamete genotypes
AaBbCC X AABbCc predict ratio of phenotypes
1:1:2:2:1:1:1:1:2:1:1:1
The cross AaBb x aabb is called
testcross
Test Cross
cross of organism with unknown dominant genotype with organism that is homozygous recessive
Assuming codominance for both genes what is the phenotypic ration of the offspring of the cross AaBb x AaBb
1:2:1:2:4:2:1:2:1
Codominant
2 or molle alleles that are equally dominant
Assuming complete dominance what is the phenotypic ratio of the offspring of the cross AaBb x aabb
1:1:1:1
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?
1:1:1:1
incomplete dominance
2 dominant alleles
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?
3:6:3:1:2:1
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?
ffYY
In a monohybrid cross between 2 true breeding parents the both exhibit dominant phenotype. What % of the offspring will exhibit the recessive phenotype.
0%
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
.42
.03
.42
.05
Chi square (x^2) test
Stat test used to see if observed values for a set of data are similar from expected values
What is the Chi square value if observed 50 purple corn and 19 yellow corn
.236
Null hyposthesis
no significant difference between observed and expected data and our observed data following Mendel 3:1 phenotypic ratio for kernel color
