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WorksheetsIGCSE 0654 B11 Inheritence
Total questions: 56
Worksheet time: 1hrs 4mins
Sperm and egg cells have a nucleus which is haploid.
State the number of chromosomes in a human haploid nucleus.
(a)
Fertilisation is the fusion of the nuclei of a male and female gamete, resulting in a zygote.
State the number of chromosomes present in a human female gamete
(a)
Fertilisation is the fusion of the nuclei of a male and female gamete, resulting in a zygote.
State the number of chromosomes present in a human zygote
(a)
(a)
The diagram below represents some stages of early embryonic development. Which process is represented by the arrows in the diagram?
meiosis
Mitosis
Fertilization
Evolution
Meiosis occurs within structure
How many goats have white fur?
(a)
State the phenotype of goat 5
(a)
(a)
What are all the possible sex chromosomes that a normal sperm may contain
(a)
Organisms pass on their genetic information in their gametes.
State the name of the type of cell division that produces gametes.
(a)
What is the term that describes the genetic make-up of an organism in terms of the alleles present?
(a)
What is the term that describes the observable features of an organism?
(a)
What is the term that describes having two identical alleles of a particular gene?
(a)
What is the term that describes having two different alleles of a particular gene?
(a)
HH x HH
Hh x Hh
Hh x hh
hh x hh
none
one quarter
one third
one half
What is produced when a cell undergoes mitosis once?
four new cells which are different from each other and from their parent cell
four new cells which are identical to each other and to their parent cell
two new cells which are different from each other and from their parent cell
two new cells which are identical to each other and to their parent cell
1 and 3
1 and 4
3 and 4
2 and 3
Which process involves meiosis?
growth of cells
production of gametes
repair of damaged tissues
replacement of cells
Which term describes the transmission of genetic information from generation to generation?
genetic engineering
inheritance
natural selection
variation
What results from meiosis of a diploid cell?
genetically different diploid cells
genetically different haploid cells
genetically identical diploid cells
genetically identical haploid cells
Which of these cells is haploid?
liver cell
red blood cell
sperm cell
zygote
Which sex chromosomes are in the Egg and the Sperm?
Egg - X
Egg - Y
Sperm - X
Sperm - Y
What is the term that describes an allele that is expressed if it is present?
(a)
What is the term that describes an allele that is only expressed when there is no dominant allele of the gene present?
(a)
A
B
C
D
Which two terms describe the genotype of goat 6?
homozygous
heterozygous
dominant
recessive
white
In which situations will mitosis occur?
asexual reproduction
growth of tissues
Creation of gametes
replacement of cells
in an embryo
Name a characteristic from the table which is controlled ONLY by genes
(a)
State the genotype of person P
Xh Xh
XH Xh
XH XH
XH Y
Xh Y
State the genotype of person Q
Xh Xh
XH Xh
XH XH
XH Y
Xh Y
What is the term that is a nucleus containing two sets of unpaired chromosomes, eg in body cells?
(a)
What is the term that is a nucleus containing a single set of unpaired chromosomes, eg in gametes?
(a)
What is the term that means a length of DNA that codes for a protein?
(a)
What is the term that means a thread-like structure of DNA that codes for a protein
(a)
What is the term that means a version of a gene?
(a)
(a)
(a)
(a)
What mostly causes discontinuous variation?
genetics
environment
both
Which are examples of discontinuous variation?
gender
tongue rolling
height
weight
Which are examples of continuous variation?
gender
tongue rolling
height
weight
What is a mutation?
a change in appearance
a change in a gene
a change in behaviour
a change in the environment
What makes tongue rolling an example of discontinuous variation?
A person can roll their tongue only when they are young
There are many different types of tongue rollers
Tongue rolling has to be learned
Tongue rolling is something that a person either can or cannot do
A
B
C
D
A
B
C
D
Select all features which are those of natural selection
genetic variation occurs within populations
some individuals are better adapted to the environment
Humans select individuals to breed with desirable characteristics
alleles of adaptions are passed onto next generations
crossing individuals for breeding depending on their characteristics
Which breed is best for a farmer who wants to sell both wool and meat?
Arawapa
Awassi
Blackbelly
Merino
Tsurcana
Variation can be caused by mutation.
Which of these statements are correct for mutation?
it is increased by ionising radiation
it is a change in the environment
it only occurs in plants
it forms new alleles
it only changes your physical appearance
how are bacteria becoming resistant to antibiotics?
bacteria does not become resistant to antibiotics.
natural selection
by wishing they were resistant.
antibiotic resistance does not exist.
What is the term to describe the process resulting from natural selection, by which populations become more suited to their environment over many generations.
(a)
What is the difference between natural and selective breeding?
Condoms
Humans
Cows
Genes
How would a farmer create bigger carrots?
Breed the smallest female cow with the smallest male cow every year and repeat with the offspring
Breed the biggest female cow with the biggest male cow every year and repeat with the offspring
Pollinate the biggest carrot plants together every year and eat the seeds
Pollinate the biggest carrot plants together every year and plant the seeds
What is phenotypic variation a variation in?
(a)
What is genetic variation a variation in?
(a)
