Genes, Alleles & Punnett Squares

Give an example of a homozygous dominant genotype. LETTERS

Can two organisms have the same phenotype but different genotypes? yes or no explain

Give an example of two alleles for eye colour. Use letters and explain them.

What information do you need to set up a Punnett square? 1-Phenotype of both parents 2- Genotype of both parents

Give an example of a homozygous recessive genotype. LETTERS

Can a heterozygous individual pass on a recessive allele? yes or no

What is the phenotype of a mouse with alleles bb for fur colour (b = white)?

Why does a heterozygous individual show the dominant trait? 1- The dominant allele masks the recessive allele 2- The recessive allele is not present

Which is visible — genotype or phenotype?

Can a dominant trait “skip” a generation? True or False

What happens when a dominant allele is present? 1- Never expressed 2-Always expressed

Does a Punnett square predict exact offspring, or probabilities?

If a plant has alleles T and t for height, what does each allele represent? T is for what and t is for what?

Where are genes found in a cell? a. Cytoplasm b. heterozygous c. chromosomes

If both parents are Bb, what are the possible genotypes of their offspring? LETTERS

If an organism’s genotype is Tt, is it heterozygous or homozygous?

How do you write a genotype for a recessive trait?

If a child shows a recessive trait, what do we know about the parents? 1- Both parents have dominant alleles 2- Both both carried at least one recessive allele

How many copies of each gene do you inherit? a- 23.  b-1.  c.4.  d.2