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WorksheetsPrac 9 - Inheritance - Revision and Lab Prep
Total questions: 46
Worksheet time: 12hrs 30mins
What is the function of the X and Y chromosomes?
Eye colour
Hair colour
Height
Sex
What is the definition of the phenotype?
The physical traits of an organism
The genetic makeup of an organism
The letters eg, Aa
How the genotype is expressed.
Which answer contains the heterozygous genotype?
AA
aa
Aa
What is the definition of an allele?
An allele is a variety of a gene.
An allele is the genetic makeup of an organism
An allele is another word for a gene.
A gene is...
A heritable factor that controls a specific characteristic
An allele
A length of DNA which occupies a specific position on the chromosome
What is the definition of a genotype?
The genetic makeup of an organism
The physical traits of an organism.
When one allele is dominant and one allele is recessive.
When both alleles are dominant.
What is the definition of heterozygous?
When both alleles are dominant
When one allele is dominant and one is recessive.
When both alleles are recessive.
When one gene is dominant and one is recessive.
A _________ is DNA tightly coiled around proteins.
gene
chromosome
trait
mutation
How many chromosomes does a human body cell have, total?
48
46
23
47
Chromosomes that are paired by size and content are called _______ chromosomes.
homeostasis
homologous
matching
sister
The chromosomes that are not involved in determining the sex of an individual are called __________.
sex chromosomes
mutations
autosomes
homologous
The 2 female sex chromosomes are ___.
XY
XX
The 2 male sex chromsomes are _____.
XY
XX
A photo of the chromosomes in a dividing cell that are arranged by size is called a _________.
mutation
gene
picture
karyotype
The different forms of a gene are called
traits
pollinators
alleles
hybrids
Dominant refers to the relationship between two versions of a gene. Individuals receive two versions of each gene, known as alleles, from each parent. If the alleles of a gene are different, one allele will be expressed; it is the dominant gene. The effect of the other allele, called recessive, is masked.
This is true.
This is false.
What pattern of inheritance is shown in this image?
Codominance
Incomplete dominance
Polygenic traits
X-linked dominant disorders are caused by variants in genes on the ___ chromosome. In males (who have only one X chromosome), a variant in the only copy of the gene in each cell causes the disorder. In females (who have ______ X chromosomes), a variant in one of the two copies of the gene in each cell is sufficient to cause the disorder.
X, two
Y, two
Which genotype represents a female who is a carrier for hemophilia?
Which genotype represents a male with hemophilia?
According to the Punnett square, what percentage of male offspring will have the disorder?
In autosomal recessive inheritance, variants occur in both copies of the gene in each cell. The parents of an individual with an autosomal recessive condition each carry one copy of the altered gene, but they typically do not show signs and symptoms of the condition.
This is true.
This is false.
Phenylketonuria (PKU) follows which pattern of inheritance?
autosomal dominant
autosomal recessive
X-linked dominant
X-linked recessive
Codominant
Albinism follows which pattern of inheritance?
autosomal dominant
autosomal recessive
X-linked dominant
X-linked recessive
Codominant
A persons's ABO blood group follows which pattern of inheritance?
autosomal dominant
autosomal recessive
X-linked dominant
X-linked recessive
Codominant
Sex-linked _______ is a rare way that a trait or disorder can be passed down through families. One abnormal gene on the X or __ chromosome can cause a sex-linked dominant disease.
dominant, Y
recessive, X
Colour blindness follows which pattern of inheritance?
autosomal dominant
autosomal recessive
X-linked dominant
X-linked recessive
Codominant
