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chapter 9
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the father of genetics was
gregor mendel
mendel obtained his P generation by allowing the plants to
self-pollinatte
true breeding pea plants always
produce offspring each of which can have only one form of a trait
the first filial (f1) generation is the result of
crosses between individuals of the parental generation
which of the following is the sesignation for mendels orgiinal pure strains of plants
P
F2:F1::
F1:P
the passing of traits from parents to offspring is called
heredity
a genetic trait that appears in every genreeation of offspring is called
dominant
homozygous:heterozygous::
BB:Bb
Mendel's finding that the inhereitance of one trait had no effect on the inheritance of another became known as the
law of independent assortment
to describe how traits can dissappear and reappear in a certain pattern from generation to genertion mendel proposed
the law of segregation
the law of segregation explains that
alleles of gene separate from each other during meiosis
when mendel crossed pea plants that differed in two characteristics such as flower color and plant height
he found that the inheritance of one trait did not influence the inheritance of the other trait
the phenotype of an organims
relfects all the traits that are actually expressed
if an individual has 2 recessive allels for the same trait, the individual is said to be
homozygous for the trait
what is expected genotypic ration resulting form homozygous dominat times heterozygous monohybrid cross
1:1
what fraction of the offspring resulting in a hetrozygous times heterozygous dihybrid cross are homozygous recessive for both traits
1/16
what is the expected genotypic ratio resulting from a heterozygous times heterozygous monohybrid cross?
1:2:1
when is the expected pheotypic ratio resulting from a homozygous dominant times heterozygous monhybrid cross?
1:0
codominace :both traits are displayed::
homozygous: alleles are the same
the differene between a monohybrid cross and a dihybrid cross is that
monohybrid crosses involve one trait and a dihybrid crosses involve two traits
what fraction of the offspring resulting from a heterozygous times heterozygous dihybrid cross are teh heterozygous for both traits
1/4
a reproductive process in which fertilization occurs within a single plant is called
self pollination
the transferring of pollen between plants is called
cross pollination
when tow members of the f1 generatin are allowed to breed with eahc toher, the offspring are referred to as the ___ generation
f2
a ____is the method for determening the genotype of an individual with a do minat phenotype
?
the statement hta tthe memebers of each pair of alleles seperate when gametes are formed is known as teh
law of segregation
different fo rms of a particular gene, which mendel called factors are now callede
alleles
the likelihood that a specific event will occur is called
probability
a situation in which both alleles for a trait are expressed in a hteterozygous ofspring is called
codominance
a table used to determine a diagram the results of a genetic cross is called a
punnent square
Author
cassidy
ID
59260
Card Set
chapter 9
Description
biology
Updated
2011-01-12T00:27:35Z
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