What is a Dihybrid Punnett Square?
Dihybrid Punnett Squares

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Biology
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9th - 10th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
A Dihybrid Punnett Square is a diagram used to predict the outcome of a genetic cross involving two traits, each represented by two alleles.
2.
FLASHCARD QUESTION
Front
What does the term 'heterozygous' mean?
Back
Heterozygous refers to having two different alleles for a specific gene, such as Aa.
3.
FLASHCARD QUESTION
Front
What does the term 'homozygous' mean?
Back
Homozygous refers to having two identical alleles for a specific gene, such as AA or aa.
4.
FLASHCARD QUESTION
Front
What is the phenotypic ratio expected from a dihybrid cross?
Back
The expected phenotypic ratio from a dihybrid cross is 9:3:3:1.
5.
FLASHCARD QUESTION
Front
What is the genotypic ratio expected from a dihybrid cross?
Back
The expected genotypic ratio from a dihybrid cross is 1:2:1:2:4:2:1:2:1.
6.
FLASHCARD QUESTION
Front
How do you determine the possible gametes from a genotype?
Back
To determine possible gametes, combine one allele from each gene. For example, from GgBb, the gametes are GB, Gb, gB, gb.
7.
FLASHCARD QUESTION
Front
What is the significance of dominant and recessive alleles?
Back
Dominant alleles mask the effect of recessive alleles in the phenotype. For example, in the case of brown (B) and blue (b) eyes, B is dominant.
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