What is the expected phenotypic ratio in a dihybrid cross when two unlinked genes are independently assorted?

Dihybrid Cross and Genetic Concepts

Interactive Video
•
Biology
•
11th - 12th Grade
•
Hard

Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3:1
9:3:3:1
1:1
2:1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is assumed about a parent if not specified otherwise in a dihybrid cross?
The parent is a hybrid.
The parent is homozygous.
The parent is heterozygous.
The parent is a mutant.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the term 'wild type' refer to in genetics?
A mutant allele
An unknown genotype
A recessive allele
The normal or most common phenotype
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a Punnett square for a dihybrid cross, how many boxes are there?
16
8
4
12
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When constructing a Punnett square, what is the significance of placing the dominant allele first?
It simplifies the calculation of phenotypic ratios.
It helps in identifying recessive traits.
It is a convention to standardize genotype notation.
It indicates the parent with the dominant trait.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the alien example, what is the phenotype of an alien with a heterozygous genotype for fur color and eye color?
Purple fur and blue eyes
Red fur and green eyes
Green fur and purple eyes
Yellow fur and red eyes
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the genotype of an alien with purple fur, given that purple is recessive?
Homozygous dominant
Heterozygous
Homozygous recessive
Unknown
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