Monohybrid Review: Question Preview (ID: 27749)

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What is an allele?
a) an alternate form of a gene
b) a different gene
c) a type of trait
d) the physical appearance of something

Phenotype refers to ___________ , while genotype refers to _________.
a) dominant trait; recessive trait
b) the genetic makeup; the physical appearance
c) the physical appearance; the genetic makeup
d) recessive trait; dominant trait

Which of these allele combinations are heterozygous?
a) MM
b) nn
c) Mn
d) Mm

Gametes are __________ that are _______.
a) somatic cells; diploid
b) somatic cells; haploid
c) sex cells; diploid
d) sex cells; haploid

A tall plant (T) is dominant to short plant (t). If all offspring of a cross are heterozygous what are the genotypes of the parents?
a) TT and Tt
b) TT and tt
c) Tt and Tt
d) Tt and tt

A heterozygous tall plant (Tt) is crossed with another heterozygous tall plant. What percent of the plants should have a tall phenotype?
a) 0%
b) 25%
c) 50%
d) 75%

Yellow pea pods (Y) are dominant over green pods (y). A heterozygote is crossed with a homozygour dominant plant. What are the possible genotypes?
a) yellow and green
b) YY and Yy
c) yy and Yy
d) green and yellow

If one fruit fly is heterozygous (red) and the other is homozygous recessive (white), what percent of the offspring should have been expected to have white eyes?
a) 25%
b) 50%
c) 75%
d) 0%

Humam gametes have ____ chromosomes.
a) 23
b) 46
c) 92
d) 4

In rabbits, grey hair is dominant to white and black eyes are dominant to red eyes. A homozygous grey, black eyed rabbit is crossed with a homozygous white, red eyed rabbit. What percentage of their children will have grey fur and black eyes?
a) 0%
b) 25%
c) 50%
d) 100%

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