Genes Flashcards
what is an allele
a different form of the same gene
define homozygous dominant
two of the same dominant allele as a genotype
define homozygou recessive
two of the same recessive allele as a genotype
define heterzygous
one dominant and recessive allele as a genotype
what is autosomal inheritance
inheritance of chromosomes that have no influence on gender
what is sex linked inheritance
inheritance of chromosomes of which sex influences
what is a punnett square
a box of all the possible genotypes from two parents genotypes
what is a test cross
one person whose genotype is unknown but carries a dominant phenotype crossed with a recessive phenotype
what is a test cross used for
discovering unknown genotype
what is a monohybrid cross
two heterozygous
what is a genotype
a specific combination of alleles
what is a phenotype
the appearance of the individual
what is the law of segregation
when chromosomes separate they rejoin as homologous pairs in fertilisation
what is the law of independent assortment
when chromosomes line up the side they choose is completely random
why are males more affected by x linked disorders
only one x chromosome which cannot be maksed by a healthy x chromosome like females
