Genetic Ratios and Probabilities

The video tutorial guides students through solving dihybrid crosses and probability worksheets. It covers setting up parental genotypes, creating gametes using the FOIL method, recombining traits, and calculating genotypic and phenotypic ratios. The tutorial also includes an analysis of watermelon traits and a section on calculating the probability of recessive traits. The teacher emphasizes consistency in notation and provides step-by-step instructions for each part of the process.

What is the dominant color for the fox coat in the dihybrid cross example?

• Silver

• Red

• Black

• White

Which method is used to create gametes in the dihybrid cross example?

• FOIL

• GRID

• TREE

• LINE

In the fox example, what is the genotypic ratio for the combination Big R Big R little H little H?

• 2:2

• 1:1

• 4:4

• 3:3

What is the phenotypic ratio for red and short hair in the fox example?

• 8:8

• 2:2

• 4:4

• 6:6

What is the dominant color for watermelon in the example?

• Red

• Yellow

• Striped

• Green

In the watermelon example, what is the phenotype when the genotype is Big G and Big R?

• Green and Long

• Green and Round

• Striped and Round

• Striped and Long

What is the probability of the recessive trait appearing in the given example?

• 21%

• 10%

• 50%

• 30%

How many times does the dominant yellow trait appear in the probability example?

• 122

• 300

• 572

• 450

What is the total number of appearances considered in the probability example?

• 600

• 122

• 572

• 450

In the probability example, what is the final percentage probability of the recessive trait?

• 21%

• 50%

• 10%

• 30%