Genetics and Heredity
Terms in this set (24)
segment of DNA on a chromosome that codes for a specific trait
alternative form of a gene.
characteristic that an organism can pass on to its offspring
allele that is expressed in an organism's phenotype, masking the effect of the recessive allele when present, AA or Aa
allele that is covered over, or dominated, by another form of that trait and seems to disappear, aa
Both alleles are the same, HH or hh
Alleles are different, Hh
An organism's genetic makeup, or allele combinations, the letters used to describe the gene
Observable physical characteristics, the description of the gene
A cross between two individuals, concentrating on two definable traits
A cross between two individuals, concentrating on only one definable trait
A type of inheritance in which two contrasting alleles contribute to the individual a trait not exactly like either parent; blending inheritance.
A condition in which neither of two alleles of a gene is dominant or recessive, and both contribute to the phenotype
A two-phase nuclear division that results in the eventual production of gametes with half the normal number of chromosomes.
Chromosomes that have the same sequence of genes, that have the same structure, and that pair during meiosis.
created during S phase of cell cycle, identical copies of chromosomes, separated dying mitosis and second stage of meiosis
Passing of traits from parents to offspring
of a cell or organism having two sets of chromosomes or twice the haploid number
An organism or cell having only one complete set of chromosomes.
A haploid cell such as an egg or sperm.
All chromosomes except the sex chromosomes.
All cells in your body except for your sex cells
involving many genes like skin and hair color
X and Y chromosomes. XX for female and XY for male; contain genes related to the gender of an organism