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Modes of gene expression differ between males and females
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1 Gene 2 Linkage
3 Sex-influenced inheritance 4 Allele
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Terms in this set (69)
basic unit of inheritance
Gene segments of dna
relatively short segments of chromosomes
long strands of DNA and associated proteins in the
nucleus of the cell
Chromosomes
present in pairs- one from sire, one from dam
number of pairs depends on the species
Homologs pair of chromosomes having corresponding loci
, Locus the specific location of a gene on a chromosome
Allele an alternate form of a gene
Multiple alleles more than two possible alleles at a locus
Genotype the combination of genes at a particular locus
a one-locus genotype containing functionally identical
Homozygous
genes
a lone-locus genotype containing functionally different
Heterozygous
genes
Mendel's First Law
in the formation of a germ cell or gamete, the two
Law of Segregation
genes at a locus in the parent cell are separated, only
one gene being incorporated into each germ cell
half the # of chromosomes and half the # of genes as
Germ cells contain...
normal body cells
Mendel's Second Law
Law of Independent
genes assort independently during meiosis if all
Assortment
possible gametes are formed in equal proportions
the occurrence of two or more loci of interest on the
Linkage
same chromosome
a reciprocal exchange of chromosome segments
between homologs
Crossing Over
occurs prior to the time chromosomes are separated to
form gametes during Meiosis
the formation of a new combination of genes on a
Recombination
chromosome as a result of crossing over
the process that determines which egg matures and
Gamete Selection
which sperm succeeds in fertilizing the egg
two dimensional grid
along the top are the possible gametes from on parent
Punnett Square and along the left side are the possible gametes from
the other parent
inside the grid are the zygotes that are possible
the random sampling of parental genes caused by
segregation and independent assortment of genes
Mendelian Sampling
during germ cell formation and by random selection of
gametes in the formation of the embryo