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WorksheetsHeredity (1 & 2 Trait Crosses)
Total questions: 20
Worksheet time: 25mins
Which of the following genotypes is homozygous dominant?
Bb
dd
G
RR
Physical descriptions such as hair color, eye color, height are known as an organisms ___________.
phenotype
genotype
The same gene can come in different versions, the different versions of a gene are called:
Alleles
Chromosomes
Traits
Which of the following would produce a recessive phenotype?
hh
Rr
Ww
BB
If your genotype is Bb, then you can only pass a B or b separately to your child but you can't pass both. This is known as the ________.
Law of Dominance
Law of Segregation
Law of Independent Assortment
The ___________ states that a recessive allele is only expressed when a dominant allele is not present.
Law of Dominance
Law of Inheritance
Different traits are inherited independently of each other
Law of independent assortment
Genetics law
What is the phenotypic ratio for the monohybrid cross between blue and brown eyes?
3:1
2:2
0:2:1
1:2:1
Based on the results in the monohybrid punnett square, what is the percent chance of having a child with blue eyes?
75%
50%
25%
0%
Based on the results in the monohybrid punnett square, what is the genotypic ratio?
1:2:1
0:2:2
0:0:4
none
What goes in box 1?
AABb
AABB
aabb
AaBB
What are the possible genotypes for this cross?
TT=25%, Tt=50%, tt=25%
all tall
TT=75%, tt=25%
Tt=100%
In cacti, long arms (A) are dominant to short arms (a). Suppose 2 heterozygous cacti are crossed. What percentage of their offspring are expected to have short arms?
0%
25%
75%
100%
In watermelons, green rinds (G) are dominant to striped rinds (g). What is the genotype of a heterozygous green watermelon?
GG
Gg
gg
green
Free earlobes, red hair
attached earlobes, non-red hair
Free earlobes, non-red hair
Attacched earlobes, red hair
In a dihybrid cross of complete dominance, what is the phenotypic ratio?
1:2:1
3:1
9:3:3:1
12:4
In a population of 100 offspring, how many would you expect to be homozygous dominant in a cross between a homozygous dominant and a homozygous recessive parent?
0
25
50
75
100
Based on the results in the monohybrid punnett, what is the phenotypic ratio?
3:1
1:1
2:2
4:0
