bio 1404 jaffe exam 5

phenotype due to change in gene regulation

A chromosomal inversion is most likely to affect

IAi

A persons has type A blood. one of the parents has O type blood. That persons genotype must be

aneuploidy

Trisomy 21 is an example of

0%

Two genes are located the farthest from each other on a single chromosome assuming no crossing over recombination frequency for these genes is expected to be

development

X inactivation occurs during

barr bodies

X inactivation results in

gene expression

a chromosomal deletion is most likely to affect

true breeding pink flowering plant

a flowering plants obeys mendelian genetics where the yellow flower is dominant over pink flowers you are given a yellow flowering plant. what type of plant would you use to perform a test cross with thus plant to determine its genotype

polyploidy and aneuploidy

a karyotype can used to most readily identify

homozygous for that trait

a recessive will be observed in an individual who is

16

an organsim with the genotype PpTtRrSs can ________ different gametes

an orange fur phenotype

cat fur color is located on x chromosome. Because of X inactivation a cat that is homozygous for orange fur color will have

more distant from each other on same chromosome

crossing over is more likely between two genes at are

non disjunction

down syndrome is typically the result of

1/32

for a cross between a pear plant with the genotype PpYyRr and with another PpyyRr the probability of the offspring having the genotype ppYyrr is

fertilization, crossing overn IA

genetic variation can occur as a result of

16

given 4 different charateristics assuming independent assortment how many different types of gamestes are possible

males are hemizygous for the X chromosome

hemophilia is recessive sex linked disorder where a persons blood does not clot properly. Males are more likely affected by this disorder than females because

dipliod

human somatic cells are

EC

humans have 2 unlinked genes one for unattached or attched earlobes (E or e) and the other for the ability to curl the tounge (C or c) if someones genetype is ECc which of the following is possible gamete phenotype of that person

no effect is observed because it only produces an effect between non homologous chromosomes

if reciprocal translocation occurs between homologous pairs of chromosomes

on the same chromosome

if two genes are linked they are

25%

in horses, black is dependent upon a dominant gene, B, and chestnut upon its recessive alle;e, b. the trotting gait is due to a dominant gene,T, the pacing gait to its recessive allele, t,. If a heterozygous black trotter (BbTt) is mated to a homozymgous chestnut trotter (bbTT) how many of the F1 generation will be heterozygous black trotter (BbTt)

0

in pea plants tall is dominant to short. if a heterozygous plant is crossed with a homozygous tall plant, what is the probability that the offspring will short

the genes for cinnabar eye color and crooked leg shape are on the same chromosome and very close to each other

in some fruit flies, the mutant cinnabar eye color always inherited another mutations crooked legs. there never appears to be any recombination of these traits with wild type traits this observation is best explained by which of the following

chromosomal inversion

in which of the following is there no gain or loss of DNA

meiosis

independent assortment occurs during

the arrangement to homologous pairs of chromosomes during metaphase 1 of meiosis

mendels law of independent assortment relates to

the seperation of homologous chromosomes during anaphase 1 of meiosis

mendels law of segregation arises from

haploid

normal gamates produced by homozygous individual are always

1/2

pea plant flower colors may be purple or white. if purple is dominant when a heterozygous plant is crossed with ahomozygous white flowering plant what is probability that the offspring will be

create a genetic map

recombination frequency for several mutant phenotypes located on the same chromosomes can be used to

the physical distance between 2 alleles on the same chromosomes

recombination frequency is a function of

the same phenotypic and genotypic ratios

snapdragons exhibit incomplete dominance crossing a red true vbreedimg plant with a white true breeding plant yields a pink F1 gen. self pollination of the f1 gen yields f2 offspring with

25%

suppose the brown allele for eye color (B) is completely dominant over the blue allele for eye color (b) what is the prob. that two heterozygous brown eyed parents produce a child tht is blue eyed

incomplete dominance

the cross of two individuals resuslts in offspring with 1:2:1 phenotype ratio for a pat. trait. what does this suggest

the parents were heterozygotes

the cross of two results in offsring with 3;1 ratio for a particular trait assuming mendelian genetics what does this suggests

located on different chromosomes

the fact tht all characteristics mendel studied exhibited independent assortment implies tht each of these alleles were

phenotype

the obervable trait of an organism is called its

25%

the pedigrees above track duchenne muscular DMD through several generations. DMD is an X linked recessive trait. Males are square symbols and females are circles. Affected imdividuals are filled symbols. If individuals I-1 and I-2 had another son, what is the chance that he would have DMD

50%

the probability tht 2 carriers of an autosomal recessive allele have offspring expressing the phenotype

the same phenotype as the parents, the same genotype as the parents

true breeding blue flowering plants always have progeny tht are

epistasis

when one gene affects the expression of another gene, this is generally referred to as

pleiotropy

when one gene has multiple phenotypic effects we call this

dividing white blood cells

which cell would be best to use for determining the karyotype of an idividual

sex linked traits

which of the following concepts is not attributable to mendel

it may result in gametes with n+1 chromosomes and it may result in gmaetes with n-1 chromosomes

which of the following is true regarding non disjunction

the white allele is recessive

white flowering plants were not observed in the F1 generation following a cross of true breeding purple and white flowering plants in Mendels monohybrid cross experiment because

traits are easily identifies, short lifecycle

why are pea plants a good model system for studying genetics

mutation

you have a set of plant that are true breeding for green seeds. after 20 generations, you find offspring tht have yellow seeds. this occurred because