Genetic Crosses Question Preview (ID: 34687)


Identifying Genotypes From Word Problems. TEACHERS: click here for quick copy question ID numbers.

aa x Aa
a) homozygous recessive x heterozygous
b) homozygous dominant x heterozygous
c) heterozygous x heterozygous
d) homozygous dominant x homozygous recessive

homozygous dominant x homozygous recessive
a) AA x Aa
b) aa x aa
c) Aa x Aa
d) AA x aa

recessive x heterozygous
a) aa x Aa
b) aa x aa
c) AA x AA
d) Aa x Aa

A plant species has two alleles for flower color: Red (R) and White (r). A heterozygous Red flower is crossed with a white flower
a) RR x rr
b) Rr x rr
c) rr x rr
d) RR xRR

an insect species have two alleles for leg length: Long (L) and short (l). a homozygous dominant insect is crossed with a heterozygous insect
a) ll xll
b) LL x LL
c) LL x Ll
d) Ll x Ll

plant species has two alleles for leaf shape: Curly (A) and flat (a). Two flat leaf shaped plants are crossed
a) AA x AA
b) aa x aa
c) Aa x Aa
d) Aa x AA

A population of dogs has two alleles for fur color: black (B) and tan (b). If the black allele exhibits complete dominance, what phenotype would a dog that was homozygous recessive at that locus have?
a) black fur
b) brown fur
c) tan fur
d) no fur

The stem length in a population of plants is controlled by two alleles: short (S) and long (s). If the phenotype of a plant is long stem, what is its genotype?
a) SS
b) Ss
c) ss
d) AB

guinea pigs have two alleles for ear shape pointy(A) and round (a). two heterozygous guinea pigs are crossed
a) AA x aa
b) Aa xaa
c) Aax Aa
d) aax aa

homozygous dominant x heterozygous
a) DD x Dd
b) dd x dd
c) Dd x dd
d) DD x DD

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