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WorksheetsGenetics
Total questions: 25
Worksheet time: 32mins
A disease that is recessive and carried on the X chromosome is known as-
incomplete dominance
messed up
sex-linked
codominance
The picture you see is an example of
genotype
phenotype
sex-linked trait
photoshop
Two different versions of a trait are called-
Alleles
Genes
Homozygous
Recessive
In Mendelian genetics, dominant traits are always expressed over recessive traits.
True
False
Bb is an example of a-
genotype
phenotype
sex-linked trait
photoshop
What is the phenotype for a baby boy?
XX
XY
XXY
What is the genotype for a baby girl?
XX
XY
XXX
Which of the following is an example of a heterozygous genotype?
HH
hh
Hh
HH is an example of-
Heterozygous
Homozygous recessive
Homozygous dominant
Someone's initials
What are the genotypes of the parents?
Hh, Hh
HH, hh
HH, Hh
not enough information is given
Two recessive parents have offspring. Can any of the offspring express the dominant trait?
No, because the parents don't have a dominant allele
Yes, dominant alleles can be passed down regardless of parent genotypes
No, two recessive parents cannot produce viable offspring
Yes, dominant traits are stronger than recessive so they will show up in the offspring
L-Long hair
l-short hair
Cross a heterozygous parent with a short haired parent. What is the genotypic ratio for the offspring?
1 LL : 2 Ll : 1 ll
3 Long hair : 1 short hair
2 long hair: 2 short hair
0 LL : 2 Ll: 2 ll
B-Brown fur b-black fur
Cross a homozygous black furred parent with a heterozygous parent? What is the phenotypic ratio from this cross?
2 BB : 2 Bb
1 BB : 2 bB : 1 bb
2 brown fur : 2 black fur
4 Brown fur : O black fur
Which of the following would express type A blood?
i i
IA i
IA IB
IB IB
Y- Yellow y-green
R- Round r- wrinkled
If one parent is YyRR and the other parent is YyRr, what is the possibility of having offspring with round seeds?
100%
75%
50%
25%
0%
Cross the following parents: Aa × aa. (A) represents a dominant allele and (a) represents a recessive allele. What percent of the offspring will express the dominant trait?
0%
25%
50%
75%
100%
What blood type is recessive (ii)?
Type A
Type B
Type AB
Type O
Y- Yellow y-green
R- Round r- wrinkled
How many of the offspring will be round and green?
1/16
3/16
4/8
9/16
A parent with the genotype SsTt will produces which possible gametes? (hint use FOIL or a gamete square)
SsTt
S, s, T, t
SS, TT
ST, St, sT, st
When two alleles are both dominant and the offspring express a blend (intermediate version) of traits, it is called-
Mendelian Genetics
Incomplete Dominance
Sex-Linked Traits
Codominance
Genes are segments of DNA that code for a specific trait.
True
False
A woman who is carrier for hemophilia would have which genotype?
XR XR
XR Y
XR Xr
Xr Y
Xr Xr
A man who has hemophilia would have which genotype?
XR XR
XR Y
XR Xr
Xr Y
Xr Xr
A woman who is not colorblind would have which genotype?
XR XR
XR Y
XR Xr
Xr Y
Xr Xr
Cross a woman who is a carrier with a man who is not colorblind. Is is possible to have a daughter who is colorblind?
Yes, since one is a carrier and will express the disorder XB Xb.
No, because one is XbY and expresses the disorder.
No, because both girls have at least one XB and this disorder must have two recessive alleles to show up.
Yes, one daughter has the possibility of being color blind because she has two small alleles Xb Xb.
