Genetics Review

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

• genotype
• homozygous
• phenotype
• trait

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

• genotype
• heterzygous
• 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

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

A section of the DNA strand that determines a specific trait

• gene
• trait
• chromosome
• allele

Tallness is dominant in pea plants and is represented by "T." What would the genotype be for a homozygous tall plant?

• Tt
• tt
• TT
• Tall 

If red flowers (R) are dominant over white, what is the probability that the offspring will be red? 

• 1 out of 4
• 2 out of 4
• 3 out of 4
• 4 out of 4

What is NOT a possible offspring genotype? 

• BB
• Bb
• bb