Genetic Lineage (Grade 12 NSC Matric Life Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is a pedigree diagram also known as?
What is a pedigree diagram also known as?
Family tree
In pedigree diagrams, which symbol represents males?
In pedigree diagrams, which symbol represents males?
Squares
What do horizontal lines represent in pedigree diagrams?
What do horizontal lines represent in pedigree diagrams?
Mating pairs
What do filled or shaded symbols indicate?
What do filled or shaded symbols indicate?
Individuals expressing the trait
In autosomal dominant inheritance, when does the trait appear?
In autosomal dominant inheritance, when does the trait appear?
In every generation
What percentage chance do children have if both parents are carriers of a recessive trait?
What percentage chance do children have if both parents are carriers of a recessive trait?
25%
Why are sex-linked traits more common in males?
Why are sex-linked traits more common in males?
They need only one copy of the allele
What genotype do individuals showing a recessive trait have?
What genotype do individuals showing a recessive trait have?
Homozygous recessive
If both parents lack a trait but their child has it, what type is the trait?
If both parents lack a trait but their child has it, what type is the trait?
Recessive
Can affected males pass sex-linked traits to their sons?
Can affected males pass sex-linked traits to their sons?
No, only to daughters who are carriers