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WorksheetsHeredity 2020
Total questions: 55
Worksheet time: 29mins
Which best explains why an organism with "Aa" will NOT show the recessive phenotype?
one allele is dominant
there are multiple possible alleles
both alleles are dominant
There are many other genes influencing this phenotype
If an organism inherits one dominant allele and one recessive allele for a trait, their genotype is called
Haploid
Homozygous
Heterozygous
Homologous
In guinea pigs, rough coat (R) is dominant to soft (r). If two parents mate and produce offspring that are 50% rough and 50% smooth, what must the parent genotypes be?
RR x rr
Rr x rr
RR x Rr
Rr x Rr
B is dominant for blue feathers, and b is recessive for red feathers. What % of the offspring will have red feathers?
0%
100%
25%
50%
A man with color vision marries a woman who is colorblind (color-blindness is sex-linked). What is the probability of them having a colorblind male?
100% of males will be colorblind
0% of males will be colorblind
50% of males will be colorblind
25% of males will be colorblind
A man with color vision marries a woman who is colorblind (color-blindness is sex-linked). What best explains why none of their daughters are colorblind?
Colorblindness is recessive and skips generations
Each daughter inherited a healthy X from their father
Each daughter has two X chromosomes
Women cannot be colorblind
The different forms of a gene.
Genes
Allele
Phenotype
Pedigree
A trait that is always hidden when the dominant allele is present.
Phenotype
Recessive allele
Genotype
Heredity
A chart that shows all the possible ways alleles can combine in a genetic cross.
Pedigree
Family tree
Heterozygous
Punnett square
A number that describes how likely it is that an event will occur.
Probability
Punnett square
Pedigree
Genotype
A chart or a family tree that shows the presence or absence of a trait according to the relationships within a family across several generations.
Punnett square
Pedigree
Heredity
Purebred
An organism's genetic makeup or allele.
Homozygous
Phenotype
Genotype
Heterozygous
An organism that has two identical alleles for a trait.
Twins
Heterozygous
Phenotype
Homozygous
Which of the following is an example of incomplete dominance?
A red cow and a white bull have a red and white spotted calf.
Human ABO blood types
A red flowering plant and a white flowering plant have pink flowered offspring.
A tall plant and a short plant have tall offspring.
In peas, yellow pod color is dominant to green pod color. Two heterozygous parents are crossed. What are the chances that the offspring will have green pods?
25%
50%
75%
100%
A white flowered plant is crossed with a red flowered plant. The two traits have codominance. What color are the offspring?
Red
White
Red and white spotted
Pink
When an offspring grows off from the body of a parent organism it is called __________________.
budding
fission
fragmentation
sporulation
Some advantages of sexual reproduction include: (select all that apply)
genetic variation
improves chances of adapting to the environment
helps species survive catastrophes
it doesn't take as much energy as asexual reproduction
Genetically identical offspring are _____________ the parent organism.
opposite of
clones of
superior to
inferior to
____________________ occurs when a male gamete (sperm) combines with a female gamete (egg).
sporulation
fertilization
fission
regeneration
Cell division in prokaryotes (bacteria) that forms two genetically identical cells:
fission
budding
cloning
vegetative regeneration
When offspring grow from part of a parent plant:
fission
budding
cloning
vegetative regeneration
What is an disadvantage of asexual reproduction?
An organism can reproduce without a mate
Some organisms can quickly produce a large number of offspring
There is little genetic variation within a population
A type of reproduction in which the genetic materials from two different cells combine, producing offspring:
asexual reproduction
sexual reproduction
Which of the following is not a benefit of asexual reproduction?
Offspring will be successful in an unchanged environment.
Good at adapting to changing environments.
Only requires one parent to produce offspring.
Can reproduce rapidly.
An organism that has been reproduced by asexual means receives ______________ of its chromosomes from its one parent.
3
25%
50%
100%
An organism that has been reproduced by sexual reproduction received ____________ of its chromosomes from the male parent.
4
25%
50%
100%
This is an example of asexual reproduction by..
budding
binary fission
sporulation (releasing spores)
vegetative propagation
How many chromosomes do human cells have?
46
23
2
44
In which ways can genetic engineering can improve crops
Make them pest or drought resistant
Make them more nutritious
Make them larger
All answers are correct
The physical traits of an organism
Teletype
Genotype
Mesotype
Phenotype
Genes always appear in pairs. Each parent donates ________ allele for every trait.
1
2
23
46
Which organism is the product of asexual reproduction?
W
X
Y
Z
To study or not to study, that is the question.
To study
Not to study
