Dihybrid Cross (Leaving Cert Biology): Quizzes
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12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is a dihybrid cross?
What is a dihybrid cross?
The mating of organisms studying two separate genes
How many separate genes are studied simultaneously in a dihybrid cross?
How many separate genes are studied simultaneously in a dihybrid cross?
Two
How many alleles does each gene have in a dihybrid cross?
How many alleles does each gene have in a dihybrid cross?
Two
How many alleles for each gene do gametes carry?
How many alleles for each gene do gametes carry?
One
What is an allele?
What is an allele?
A different form of the same gene
What does a dominant allele do?
What does a dominant allele do?
Masks the effect of the recessive allele
What gametes can a TTPP parent produce?
What gametes can a TTPP parent produce?
Only TP
What is the F1 genotype from TTPP x ttpp?
What is the F1 genotype from TTPP x ttpp?
100% TtPp
How many different gametes can TtPp produce?
How many different gametes can TtPp produce?
Four
What is the phenotypic ratio for ttpp x TtPp?
What is the phenotypic ratio for ttpp x TtPp?
1:1:1:1
What is the phenotypic ratio for TtPp x TtPp?
What is the phenotypic ratio for TtPp x TtPp?
9:3:3:1
What ratio is typical for a dihybrid cross between heterozygous parents?
What ratio is typical for a dihybrid cross between heterozygous parents?
9:3:3:1