bio final ch 23
for a dihybrid cross the punnet square will have how may boxes?
16
how many different gamete combinations are there for a parent with this genotype: RrYy
4
the genotype for a homozygous dominant trait would be written as
TT
the genotype for a heterozygous trait would be written as
Tt
alternative forms of a gene that influence the same trait and are found at the same location in homologous chromosomes are called
alleles
mendel's law of segregation implies that the two members of an allelic pair
are distributed to separate gametes
when two traits coexist, or are displayed at the same time, such as a black and white cow, it is called
codominance
a cross that involves two traits is called a ____ cross
dihybrid
for an individual with a heterozygous genotype, which trait will be expressed physicaly
dominant trait
which gender has two X chromosomes (XX)
females
this refers to a pair of genes or alleles that an individual inherits from their parents
genotype
assume green is dominant and yellow is recessive. what would be the phenotype for this individual GG
green
assume green is dominant and yellow is recessive. what would be the phenotype for this individual Gg
green
who is knowns as the father of genetics
gregor medel
in a testcross, an organism with a dominant phenotype, but unknown genotype is crossed with which of the following to establish its gentoype
homozygous recessive
a cross between a red flower and a white flower produces a pink offspring. what type of inheritance does this display?
incomplete dominance
this law states that allele pairs separate independently during the formation of gametes
law of independent assortment
which gender has one X chromosome and one Y chromosome (XY)
males
when more than 2 different alleles exist for the same trait, like blood type for example it is known as
multiple alleles
if an organism shows a recessive phenotype, such as short pea plants, its genotype can be
only tt
in genetics, P stands for
parent generation
this refers to an individual's physical charactertics
phenotype
a type of inheritance pattern controlled by 2 or more genes each with 2 alleles, which results in a range of variation, for example eye color, hair color, skin color, and height
polygenic inheritance
a genetic trait that is only located on the X or Y chromosomes is known as
sex-linked trait
the genotype for a homozygous recessive trait would be written as
tt
assume green is dominant and yellow is recessive. what would be the phenotype for this individual gg
yellow