Genetics Review

------is the combination of two alleles that are different from one another.

• homozygous

• heterzygous

• phenotype

• trait

------is the combination of two alleles that are different from one another.

• homozygous

• heterzygous

• phenotype

• trait

The letters that make-up the genetic code for a trait

• genotype

• heterzygous

• phenotype

• trait

---- Is the combination of two alleles that are the same

• genotype

• homozygous

• phenotype

• trait

----is the type of gene that always shows itself when present

• genotype

• homozygous

• phenotype

• dominant

The physical appearance of the allele combination the offspring receives

• genotype

• homozygous

• phenotype

• dominant

Black fur (B) is dominant. Find the probability of a black offspring in a cross: bb x bb. 

• 0%

• 25%

• 50%

• 100%

Look at the Punnett Square. What's the probability of having the recessive offspring?

• 100%

• 75%

• 50%

• 25%

What are the parents' genotypes?

• Homozygous for brown eyes

• Heterozygous for brown eyes

• Homozygous for blue eyes

• Heterozygous for blue eyes

What is the phenotype for the recessive trait?

• brown eyes

• green eyes

• blue eyes