Genetics Test Review

Using the Punnett Square in the picture, predict the genotype that would be found in the box with the question mark

• TT

• Tt

• tt

• impossible to determine from information given

Which of the following tools is used to match up chromosome pairs and organize them by size?

• pedigree chart

• karotype

• meiosis map

• linkage map

Homozygous dominant is an example of a_____?

• monotype

• karyotype

• genotype

• phenotype

Which of the following is heterozygous?

• AA

• Aa

• aa

• none of the above

• all of the above

Using the pedigree, how many offspring did couple II- 1 & II-2 have?

• 2

• 3

• 4

• 6

Using the pedigree chart, what must be the mode of inheritance in this PTC tasting gene?

• autosomal dominant

• autosomal recessive

• sex-linked dominant

• sex-linked recessive

Using the pedigree chart, what must be the genotype of individual II-4?

• homozygous dominant

• homozygous recessive

• heterozygous carrier

• homozygous carrier

In complete dominance problems, which of the following genotypes will express the dominant phenotype?

• Tt

• TT

• tt

• Both TT and tt

• Both TT and Tt

How many phenotypes are possible when a trait is governed by complete dominance?

• 1

• 2

• 3

• 4

What is the predicted percentage of individuals in the Punnett square shown that will express the dominant trait?

• 25%

• 50%

• 75%

• 100%