8th Grade Genetic Exam Question Preview (ID: 47051)


Genetics Vocab And Punnett Squares. TEACHERS: click here for quick copy question ID numbers.

AA
a) Homo dominant
b) Homo recessive
c) hetero
d) Hetero recessive

bb
a) homo recessive
b) homo dominant
c) hetero
d) hetero recessive

Hh
a) Hetero
b) homo dominant
c) homo recessive
d) hetero dominant

In dogs, the gene for fur color has two alleles. The dominant allele (F) codes for grey fur and the recessive allele (f) codes for black fur. The female dog is heterozygous. The male dog is homozygous recessive. How many puppies are grey?
a) 50%
b) 25%
c) 100%
d) 75%

In dogs, the gene for fur color has two alleles. The dominant allele (F) codes for grey fur and the recessive allele (f) codes for black fur. The female dog is black. The male dog is black. What could their genotypes be?
a) FF or Ff
b) Ff or ff
c) FF or ff
d) ff

In dogs, the gene for fur color has two alleles. The dominant allele (F) codes for grey fur and the recessive allele (f) codes for black fur. The female dog is heterozygous. The male dog is heterozygous. How many puppies are grey?
a) 25%
b) 50%
c) 100%
d) 75%

In fruit flies, red eyes are dominant (E). White-eyes are recessive (e). A female fly has white eyes, and the male fly is homozygous dominant for red eyes. What must the females genotype be?
a) ee
b) Ee
c) EE
d) EEe

Rr x rr What are the genotypes of the offspring?
a) 50% Rr 50% rr
b) 75% Rr 25% rr
c) 100% rr
d) 100% Rr

What is a dominant trait?
a) The trait that overshadows and is expressed (capital letter)
b) The trait that hides in the background (lower case letter)
c) The letters that represent the different forms of a gene
d) the physical appearance of a trait

Recessive
a) The trait that hides in the background (lower case letter)
b) The trait that overshadows and is expressed (capital letter)
c) The letters that represent the different forms of a gene (d=Dimples)
d) the physical appearance of a trait

The letters that represent the different forms of a gene (d=Dimples)
a) Allele
b) Phenotype
c) Genotype
d) Dominant

Phenotype
a) Physical appearance of a trait (what you can see)
b) Pair of alleles
c) One allele
d) Homozygous

Combination of alleles (letters) DD, Dd,dd
a) Genotype
b) Phenotype
c) Homozygous
d) Heterozygous

Two alleles/letters for one trait that are different
a) Heterozygous
b) Homozygous recessive
c) Homozygous dominant
d) Heterozygous recessive

Two alleles/letters for one trait that are the same (DD, dd)
a) Homozygous
b) Heterzygous
c) genotype
d) phenotype

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