Year 10 - Biology - Punnet square and pedigree charts

What is the correct definition?

Dominant

• Different forms of the same gene

• The characteristic that is expressed even if only one copy of this allele is present

• The characteristic that remains hidden

• A mistake that happens as DNA is copied

What is the correct definition?

Recessive

• Different forms of the same gene

• The characteristic that is expressed even if only one copy of this allele is present

• The characteristic that remains hidden

• A mistake that happens as DNA is copied

What is the correct definition?

Mutation

• Different forms of the same gene

• The characteristic that is expressed even if only one copy of this allele is present

• The characteristic that remains hidden

• A mistake that happens as DNA is copied

What is the correct definition?

Alleles

• Different forms of the same gene

• The characteristic that is expressed even if only one copy of this allele is present

• The characteristic that remains hidden

• A mistake that happens as DNA is copied

What is the correct definition?

Phenotype

• Having two different alleles on homologous chromosomes

• Genetic information carried by an individual

• Observable characteristics of the individual or the way the genotype is expressed

• Having two identical alleles on homologous chromosomes

What is the correct definition?

Genotype

• Having two different alleles on homologous chromosomes

• Genetic information carried by an individual

• Observable characteristics of the individual or the way the genotype is expressed

• Having two identical alleles on homologous chromosomes

What is the correct definition?

Heterozygous

• Having two different alleles on homologous chromosomes

• Genetic information carried by an individual

• Observable characteristics of the individual or the way the genotype is expressed

• Having two identical alleles on homologous chromosomes

What is the correct definition?

Homozygous

• Having two different alleles on homologous chromosomes

• Genetic information carried by an individual

• Observable characteristics of the individual or the way the genotype is expressed

• Having two identical alleles on homologous chromosomes

Which statement is incorrect?

• Both parents are heterozygous for this trait.

• 25% of the offspring is homozygous for the recessive trait.

• 75% of the offspring will have the same phenotype.

• 100% of the offspring will look like the parents.

True or false? This is an example of co-dominance or incomplete dominance.

• True

• False