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IB Biology Vocab - 3.4

Across
A cell containing only one set of chromosomes (n).
a hereditary unit consisting of a sequence of DNA that occupies a specific location on a chromosome and determines a particular characteristic in an organism.
when one allele covers the phenotypic expression of another allele at the same gene locus.
a variety of disorders marked by inability to distinguish some or all colors
Fertilized eggs
pairs of alleles that both affect the phenotype when present in a heterozygote
Inheritance of a genetic trait located on the sex chromosomes
a diagram that is used to predict an outcome of a particular cross or breeding experiment.
An organism's physical appearance, or visible traits.
A chart that shows all the possible combinations of alleles that can result from a genetic cross
genetic makeup of an organism
Down
an autosomal dominant condition characterized by forgetfulness and irritability
A chemical or physical agent that interacts with DNA and causes a mutation.
all chromosomes other than X and Y
an allele whose trait always shows up in the organism when the allele is present
A genetic disorder that is present at birth and affects both the respiratory and digestive systems.
A hereditary disease where blood does not coagulate to stop bleeding
An alternative form of a gene.
sex cells