WorksheetsMendelian Genetics
Total questions: 17
Worksheet time: 14mins
A HETEROZYGOUS individual would have the genotype:
Hh
hh
HH
Hi
In humans, blue eyes are a recessive trait. What genotype would a blue eyed child have?
BB
Bb
bb
None of the above, brown eyes are dominant.
In pea plants, tall (T) plant alleles are dominant to short (t) plant alleles. If two tall plants (each with the genotype Tt) are crossed, what is the probability that the cross would result in a short pea plant?
25%
50%
75%
100%
Genes determine the characteristics, or __?__, that an individual can have.
chromosomes
cells
genetics
traits
Patrick Star recently married Patti. He is considered a purebred for his tall head shape (T), which is dominant over a short head (t). If Patti is a short-headed woman, what type of heads would their children have? (HINT: do a Punnett Square on a piece of paper)
75% Tall and 25% short
25% Tall and 75% short
50% Tall and 50% short
100% Tall
The physical expression of a trait is called the ...
genotype
phenotype
Genotype: TT
homozygous dominant
homozygous recessive
heterozygous dominant
Genotype: Aa
homozygous dominant
homozygous recessive
heterozygous dominant
The trait or allele that is expressed when only one is present is called the ___________ trait.
dominant
recessive
Which statement below describes RECESSIVE alleles?
expressed when at least one is present
only expressed when 2 are present
In pea plants, tall (T) is dominant over short (t). If two heterozygous tall pea plants are mated, what is the the expected genotypic ratio of their offspring?
3 tall : 1 short
1 TT : 2 Tt : 1 tt
