Flashcards in Genetics Deck (31)
The study of genes
the passing of physical or mental characteristics genetically from one generation to another.
a genetically determined characteristic
Those that consistently produce offspring the same as the parents.
traits that are expressed
Traits that are covered up
Reproductive cells (ova-females and sperm-males). They combine to form a new baby cell.
Deoxyribonucleic Acid- a long molecule that each gene is made of.
in the nucleus of each cell, the DNA molecule is packaged in a thread, like structure.
complete set of chromosomes
half set of chromosomes
Different form of the same gene.
The types of genes (alleles) present
Appearance pronounced by a genotype
Both alleles are the same
Both alleles are different
What do A,T,C and G stand for?
Height and weight
What are the parts of DNA.
-base pairs (AT, TA, CG, GC)
A sequence of three nucleotides that together form a unit of genetic code in DNA or RNA molecules. eg. GAC, TTT, CCC, GAT
Any spontaneous change in a gene or chromosome that may produce an alteration in the characteristic for which it codes.
a type of cell division that results in 4 daughter cells, each with half the number of chromosomes of the parent cell. Occurs for reproductive cells
A type of cell division that results in two daughter cells being an exact copy of the parent cell. Occurs in somatic cells eg skin, muscles. Used for healing, repair and growth.
an agent which causes genetic mutation eg. x-rays, gamma rays and ultra violet light
Good and Bad Mutations
Good- new and improved variations
Bad- diseases such as HIV
intention mating of two animals in attempt to produce offspring with desirable characteristics or eliminate traits
circular pieces of DNA in bacteria. human DNA can be inserted into plasmids to correct mutations.
In terms of chromosomes, whats the main difference between a female and male?
girls = XX
boys = XY