Genetics TBL Flashcards
Which statement best decribes the role of DNA
DNA forms part of a messenger molecule for the transport of protein receipe instructions destined for the ribosomes
DNA is a double helix shaped molecule containing amino acids and bases and can replicate identical molecules for export from the nucleus
Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions for the development and function of all living things, serving as a molecule for long term storage of information.
DNA is the master blueprint for the making of certain proteins in the cell and has the capacity to generate new organelles for the cell
Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions for the development and function of all living things, serving as a molecule for long term storage of information.
The term gene refers to
A strand of DNA folded to form an X shape structure that can be transferred to the next generation
A sequence of nucleotides that form part of a larger molecule that acts as a spell check enzyme in the DNA molecule
A sequence of nucleotides in DNA or RNA that encodes the synthesis of a certain products (proteins) with a specific function
distinct sequence of nucleic acids that for part of a carbohydrate
A sequence of nucleotides in DNA or RNA that encodes the synthesis of a certain products (proteins) with a specific function
A nucleotide is
A section of a nucleic acid whereby a single nucleotide forms a single gene
An L shaped molecule that contains a sugar, phosphate and a base and forms the backbonbe of a nucleic acid
A nucleotide forms a link between amino acids
A nucleotide is a single strand of DNA
An L shaped molecule that contains a sugar, phosphate and a base and forms the backbonbe of a nucleic acid
A chromosome is
A folded strand of DNA
A section of DNA
A fragment of a nucleotide
Another name for a gene
A folded strand of DNA
What term describes transmission of traits from one generation to the next?
Hybrid
Character
Trait
Heredity
Heredity
A trait means
The specific variant characteristic of an individual that may be visible or behavioural
The gene that is dominant and active in an individual
The heritable gene that makes it to the next generation
The specific gene arrangement that is passed on to the offspring
The specific variant characteristic of an individual that may be visible or behavioural
Genotype means
The type of DNA synthesis that an individual can produce
An alternative term for the type of inheritance eg sex linked or otherwise
The unseen genetic constitution of an individual
The visible apperance of a specific chracteristic determined by certain genes
The unseen genetic constitution of an individual
What is an autosome?
A chromosome that is not a sex chromosome
A self made chromosome
An enzyme that autimatically ensures that the DNA replication process occurs at the right phase in the cell cycle
An organelle rather like a lysosome but smaller
A chromosome that is not a sex chromosome
What is meant by the term ‘base’ in the science of genetics?
The backbone of a DNA molecule that form the curvature of the helix is called a base
The ‘step’ formation of the ladder structure of DNA is formed by two bases which always link in a specific pair formation
A baseline quantitive value for the ratio of mitosis
The links between two DNA molecules are called bases
The ‘step’ formation of the ladder structure of DNA is formed by two bases which always link in a specific pair formation
Determine the probibility that an Aa individual will be produced from parents Aa x Aa
75%
50%
100%
25%
50 %
Homozygous means
The two alleles are neutral
One allele is dominant
The two alleles are different
The two alleles are the same
The two alleles are the same
An allele is
A section of a nucleotide
A variant form of a gene
A recessive gene
A recombined gene
A variant form of a gene
What is karyotype and how many components should it have in humans?
An individuals collection of chromosomes visible using high power microscope revealing 23 pairs
An individuals collection of chromosomes visible using high power microscope revealing 46 pairs
A collection of genes that form a single chromosome that contain a million genes
A collection of genes that form a single chromosome that contain a million genes
An individuals collection of chromosomes visible using high power microscope revealing 23 pairs
Downs syndrome is the result of
A chromosomal duplication of chromosome 21
A chromosomal deletion mutation
A chromosomal inverse insertion mutation
A ;point mutation that means that base pairs are ill matched
A chromosomal duplication of chromosome 21
Breast cancer, which of the following is true?
There is no relationship with genetics across generations
Is a disease acquired by environmental factors only
Breast cancer is related to a dietary deficiency
There is strong evidence to suggest that breast cancer can be the result of both genetic and environmental factors
There is strong evidence to suggest that breast cancer can be the result of both genetic and environmental factors
