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WorksheetsExploring Genetics and Cell Division
Total questions: 38
Worksheet time: 32mins
What is the main function of DNA in living organisms?
To provide energy for cells
To store genetic information
To help with digestion
To transport oxygen
Which base pairs with adenine (A) in the DNA double helix?
Guanine (G)
Thymine (T)
Cytosine (C)
Uracil (U)
During which stage of mitosis do the chromosomes line up in the centre of the cell?
Prophase
Metaphase
Anaphase
Telophase
What is the result of mitosis in terms of the number and type of cells produced?
Four identical cells
Two identical cells
Two different cells
Four different cells
Which process leads to genetic variation in offspring?
Mitosis
Meiosis
Binary fission
Budding
What is crossing over and when does it occur?
Exchange of DNA between sister chromatids during mitosis
Exchange of DNA between homologous chromosomes during meiosis
Exchange of DNA between parent and offspring
Exchange of DNA during fertilisation
Which of the following is an example of an epigenetic modification?
Mutation in a gene
Addition of a methyl group to DNA
Change in chromosome number
Crossing over
What is the effect of DNA methylation on gene expression?
Increases gene expression
Decreases gene expression
Has no effect
Causes mutation
Which chromosomal abnormality is characterised by an extra copy of chromosome 21?
Turner syndrome
Down syndrome
Klinefelter syndrome
Edwards syndrome
What is the normal diploid number of chromosomes in a human cell?
23
46
44
22
Which inheritance pattern results in a blend of traits, such as pink flowers from red and white parents?
Complete dominance
Incomplete dominance
Codominance
Sex-linked inheritance
What is the genotype of a person who is heterozygous for a trait?
AA
aa
Aa
aA
Which stage of mitosis involves the separation of sister chromatids?
Prophase
Metaphase
Anaphase
Telophase
What is the main difference between mitosis and meiosis?
Mitosis produces identical cells, meiosis produces genetically varied cells
Mitosis occurs in gametes, meiosis occurs in body cells
Mitosis reduces chromosome number, meiosis increases it
Mitosis involves crossing over, meiosis does not
Which of the following is a sex-linked inheritance pattern?
Traits found on autosomes
Traits found on the X or Y chromosome
Traits found on mitochondrial DNA
Traits found on ribosomal RNA
What is the name of the structure that holds sister chromatids together?
Centromere
Chromatin
Nucleolus
Ribosome
Which of the following is NOT a stage of mitosis?
Prophase
Interphase
Metaphase
Telophase
What is the term for a change in the DNA sequence?
Mutation
Translation
Replication
Transcription
Which process ensures that gametes have half the number of chromosomes as body cells?
Mitosis
Meiosis
Fertilisation
Replication
If a mother is a carrier for a recessive X-linked trait and the father does not have the trait, what is the chance their son will inherit the trait?
0%
25%
50%
100%
A personal with type AB blood has which genotype?
type A
AA
IAIA
IAIB
If the offsprings have the blood groups O and A the genotype of parents would be
IAIA and IAi
IA i and ii
IAIA and IAIA
IA i and IBi
If a person has type B blood, the phenotype is B. What can the genotype be?
IBIB or IBi
IAIA or IAi
IAIB
ii
What is the Genotype for Heterozygous Type A Blood
IᴬIᴮ
Iᴬi
IᴬIᴬ
IᴮIᴮ
Which of the following represents a Heterozygous genotype?
AA
Aa
aa
Colorblindness is a recessive X-linked disorder.
Which genotype represents a male with normal vision?
XN YN
Xn Yn
XN Y
Xn Y
Which of the following describes an advantage of sexual reproduction?
rapid population growth
increased protection against inherited genetic disorders
reduced resource investment by the reproducing organism
the clonal nature of offspring fine-tuned for success in their environment
Which of the following best describes the difference between biotic and abiotic pollinators?
Biotic pollinators are living organisms, while abiotic pollinators are non-living mechanisms of pollen transfer.
Biotic pollinators are living organisms that depend on the pollen created by the plant for survival, while abiotic pollinators are living organisms that are attracted to the bright colours of the flower.
Which of the following descriptions best distinguishes budding from fragmentation?
Budding is a type of asexual reproduction, whereas fragmentation is a type of sexual reproduction
Budding occurs more readily in simple aquatic animals such as sponges and jellyfish, while fragmentation occurs exclusively in plant species.
Budding involves a small bud forming and breaking away from the parent organism, while fragmentation involves a parent organism physically breaking into fragments.
Which of the following is the main advantage of sexual reproduction over asexual reproduction?
Sexual reproduction increases genetic diversity in a population by allowing for recombinant offspring
Sexual reproduction is much safer than asexual reproduction, which often causes an organism to split itself into fragments
Sexual reproduction better maintains genetic diversity in a population as it ensures that strong alleles are selected for and reproduced in a population.
The male sex cell is called the .......
zygote
egg
sperm
cell
Asexual reproduction is the production of offspring from _ parent(s)
1
2
3
4
