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WorksheetsPhysiological Genetics
Total questions: 131
Worksheet time: 2hrs 11mins
…….. an allele that is masked whenever the dominant allele is present
Dominant
recessive
Co-Dominant
which of the following influence an organism phenotype
recessive
Dominant
all of them
……………. some alleles for gene aren’t completely dominant the other
Dominant
recessive
incomplete dominanc
……………….. two alleles affect the phenotype in separate and distinguishable ways.
Incomplete Dominance
recessive
co-dominance
…………….. mean that the dominant genes give the same phenotype as the recessive genes
recessive epistasis
Co-dominance
recessive
…………… mean that one dominant gene epistatic on one dominant gene
Co-dominance
dominant epistasis
recessive epistasis
………….. from the type of epistasis
dominant epistasis
recessive epistasis
all of them
Sex Expression is governed by…......
chromosomes
Genes
Both of them
There are two general types of cells………
Somatic and Epidermal cells
Epithelium and Neuron cells
Somatic and germ cells
Chromosomes often come in pairs called……....
Homozygous
Homologous
Heterozygous
Mitosis is……......
Two progeny with same ploidy as parent cell
Two progeny with different ploidy as parent cell
Four progeny with half ploidy of parent cell
Heterozygous females transmit mutation to……..
All of the offspring
1/4 of their sons
1/2 of their sons
IF Many genes can contribute to single product how do we know if 2 mutation causing same phenotype are in same gene?
We use a simple genetic test , called a complementation test
We use a simple genetic test , called a complementary test
We use a complex genetic test , called a complementation test
In most plants , ..............reproductive organs are found in the same flower is called as Bisexual or Hermaphrodite.
male
female
male and female
Which of the following is an important sex-determining mechanism?
Sex character
Chromosomal sex determination
All of them
Chromosomes which do not differ imorphology and number in male and female…..........
autosome
Allosomes
both of them
types of chromosomal sex determination:
Sex determination by allosomes
Genic balance system
all
one side of the fly is male and the other side is female. This is the most common type of sex mosaic……
Bilateral sex mosaic
Antero-posterior sex mosaic
Sex mosaic in Patches
.....…….are generally of X and Y types, but in some birds they are of Z and W types
Autosomes
Allosomes or sex chromosomes
Diploid-Haploid
The Genic Balance System is the system was developed by…....….in……........
Bridges in Drosoplaila
Hindll in E.coli
mendel in Drosoplaila
the front half of the fly is one sex and the rear half of the other sex.
Sex mosaic in Patches
Antero-posterior sex mosaic
Bilateral sex mosaic
Responsible for the Laws governing Inheritance of Traits…….
cloud bernar
starling
Gregor Mendel
any characteristic that can be passed from parent to offspring is…..
Trait
Heredity
Genetics
General environmental refers of……..
genetic
physica
Both of them
cell division that reduces chromosome number by ½ (2n) is…….....
Meiosis
Mitosis
non of them
...…….is used to increase genetic diversity of gametes produced
meiosis
crossing overseas
both
Type of division which produces half ploidy of mother
mitosis
meiosis
all
crossing over is used to ………
increase genetic diversity of gametes that produced
reduce genetic diversity of gametes that produced
stop genetic diversity of gametes that produced
steps of Meiosis 1 are …….
prophase 1
metaphase 1
All of the above
at meiosis 2 , which occur …….
(DNA replication occur
Nuclear envelope may reform transiently
both of them
........... cross involving a single trait such as flower colour
Dihybrid cross
monohybrid
all of them
-the physical feature resulting from a genotype such as red and white
Genes
genotype
phenotype
.........genotype-gene combination of one dominant and one recessive allele called hybrid
heterozygous
Homozygous
both of them
types of genetic crosses…..
Monohybrid cross
Dihybrid cross
both of them
Chromosome Types is …….
autosome
allosomes
all of above
....….chromosomes which differ in morphology ,number in male ,female
allosomes
sex chromosomes
both 0f them
…….Exhipit sex linkage
allosome
autosome
both of them
-xx-xy female and male system exsist in ……..
mammals
Dorosophila
all of above
Tybes of alleles is……
dominant
recessive
all of above
..…… physical feature result from genotype
phenotype
allele
trait
pollen contain sperm which produced by……..
stamen
ovary
all of above
….. an allele that is expressed whenever it is present
Dominant
recessive
co-dominant
mendel produced pure strains through …...........
self pollinaited
cross pollinatied
both
mendel study inheritance of traits on ……
pea plant
rice
wheet
at first mendel assumed that traits inherited as ….......
Chromosome
particles
both
- ............….chromosomes which don’t differ in morphology ,number in male ,female
allosomes
autosome
sex chromosomes
Sex expression is governed by chromosomes and genes in ……..
Unisexual animals
bisexual animals
none of them
Unisexual diploid individuals have ……… sex chromosomes and rest are autosomes
Two
three
four
In Autosomes chromosomes no. is …….
2n-1
2n+1
n-1
Mechanism of Sex determination ………….. important mechanisms
two
three
four
Expression of sex is influenced by……
single gene
double gene
triple gene
turtle, Alligators and Crocodiles Incubation temperature of egg is ……… in female
30-35ºC
35-40ºC
25-30ºC
Drosophila flies …………… have male tissues in one part of the body and female tissues in other.
(1 in 1000)
(2 in 1000)
(1 in 2000)
n turtle, Alligators and Crocodiles Incubation temperature of egg is ……… in male
30-35ºC
23-28ºC
25-30ºC
Drosophila Individuals with such sex mosaic are known as……..
gynandromorphs
gynanders
both
Three patterns of sex mosaic may be found in Drosophila
Bilateral sex mosaic
Antero-posterior sex mosaic
all of them
In Autosomes Morphology is ………in male and female.
similar
different
none of them
................gene combination for a trait.
Genotype
Phenotype
none of them
.........Gene combination involving 2 dominant or 2recessive genes and also called pure.
Homozygous
Heterozygous
both of them
Two alleles are expressed in heterozygous in dividuals....................
Incompletedominance
Codominance
phenotype
Example of incomplete dominance..................
Snapdragons
Bloodtype
gynanders
In humans, each cell normally contains ........... of chromosomes.
11 pairs
23 pairs
32 pairs
............ explained genetic disorders such as alkaptonuria and albinism.
Recessive inheritance
Dominant genes
X chromosomes
The ........ is the set of observable characteristics and is the sum of genetic and environmental effects.
genotype
phenotype
both genotype and phenotype
What is a section of DNA that codes for a protein called?
Gene
Chromosome
Allele
Which of these is a correct type of mutation?
Transcription
Polymerase
Substitution
Crossing-over takes place in the........
Diakinesis stage
Anaphase stage
Pachytene stage
There are 4 pairs of chromosomes in a Drosophila. The linkage groups present in it are
one more than the pair of chromosomes
four
eight
Percentage of crossing over is more when
genes are located in a different cell
genes are not linked
linked genes are located far apart from each other
If the percentage of crossing over between two genes is 10, then the distance between two genes will be
5 morganoid
10 centimorgans
20 centimorgan
Alleles of different genes that are on the same chromosome can occasionally be separated by a phenomenon called
crossing over
continuous variation
epistasis
Repulsion and coupling are two faces of
mutation
chiasmata
linkage
If gene frequency between genes a and c is 2%; b and c is 13%; b and d 4%; a and b 15%; c and d 17 and a and d 19%. The sequence of genes in a chromosome is
a,d,b,c
a,b,c,d
a,c,b,d
This is the reason why Mendel did not recognize linkage phenomenon in his experiments
characters he studied were situated on different chromosomes
he studied only pure plants
he did not have a powerful microscope
In a linear chromosome map distance between 4 loci is as follows a-b is 10%, a-d is 3%, b-c is 4% and a-c is 6%. The crossover frequency between c and d is
12%
3%
9%
Where does this evidence come from? – crossing over takes place at a four-stranded stage and not at two stranded stages of chromosomes
studies on linkage maps of chromosomes in Drosophila
studies of meiosis in maize
2:2:2:2 organization of ascospores in Neurospora
In some plant male and female flowers are produced on different plants is called as ..........
Bisexual
monoecious
Dioecious
In the ........... system ,female has only one X chromosome and hence is heterogametic
XX-XO [Female-Male] System
XO-XX [Female-Male] System
ZW ZZ [Female-Male] System
In honey bees,the females have diploid (2n=.......) chromosomes and drones or males have haploid(n=........) chromosomes.
32 , 16
46 , 23
20 , 10
............... one side of the fly is male and the_otherside female.This is the most common Type of sex mosaic.
Sex mosaic Patches
Antero-posterior sex mosaic
Bilateral sex mosaic
How many gametes will be produced for the followibg allele arrangement? (RrYy)
2 gametes
4 gametes
6 gametes
.........,gene that shows up less often in a cross, represented by a lowecase letter (r)
Dominant
Recessive
Dominant and recessive
How many gametes will be produced for the followibg allele arrangement? (AaBbCCDd)
4 gametes
6 gametes
8 gametes
Most studies on human genetics have been made through
Genetic engineering
Eugenics
Microscopic studies of Chromosomes
The symbol of empty circles used in pedigree analysis represents
Normal female
Affected female
Affected male
The RNA and Protein Synthesis Occur in____
M phase
S phase
G1 phase
When Synapsis Occurs at Meiosis?
Zygotene
Leptotene
Diplotene
Chromosomes Break During?
Prophase
Ana phase
Metaphase
Call the step of prophase I when synaptonemic complex dissolves, when chromatids are transparent and tetrads are considered bivalents
Packytene
Diakinesis
Diptolene
Syndactyly refers to
Fused fingers
Fused toes
both of them
Presence of extra finger or toe is known as
POLYDACTYLY
Brachydactyly
None of the above
Polydactyly in man due to
Autosomal dominant gene
Autosomal Recessive gene
Sex linked dominant gene
According to Mendelian ratios. Interactions between mutations in different genes can modify ……. phenotypic ratios.
9:3:3:1
3:3:1:9
9:1:3:3
Crossing over results in ………..
Gametes
New genetic combination
Cancerous growths
in …… cycle two progeny with same ploidy as parent cell
Miosis
Mitosis
both of them
In ………. the chromosomes are not condensed.in miotic cycle.
Interphase
Metaphase
Anaphase
information are stored in DNA in a series called
Phosphor bases
Nitrogen bases
Iron bases
Which of the following statements is true about Mendel?
He believed that genetic traits of parents will usually blend in their children
His ideas about genetics apply equally to plants and animals
Non of them
Phenotype refers to the ……… of an individual
actual physical appearance
physical features resulting from phenotype
both of them
The important of Nucleic Acid …..
keep Genetic Material
Transfer Genetic Material to offspring
all of them
pattern of sex chromosome in human
XO pattern
WZ pattern
XY pattern
Hereditary determinants for the traits in the parental line were inherited as 2 different elements that retain their purity in the hybrid.
Gene
Mutations
Mendel’s genetic hypothesis
-………….. is change in the nucleotides sequence of a gene and may involve
a single nucleotide.
Deletion
Gene Mutation
Mutation
………… is 1 in 109 billion replicated base pairs
Substitutions
Transition
Spontaneous Mutation Rate
A purine base is replaced by a purine base or pyrimidine base is replaced by another pyrimidine base is process called ……….
Substitution
Transition
Transversion
………… is substitution of purine base by a pyrimidine base and vice versa.
substitution
Transition
Transversion
………….. is result in a different amino acid at one position of encoded protein.
Missense Mutation
Nonsense Mutation
Silent Mutation
………… converts a codon that specific an amino acid into a termination codon
Missense Mutation
Nonsense Mutation
Silent Mutation
-………… is inverted or deleting one or more nucleotides and change the reading frame.
Phenotypic
Frameshift Mutation
Natural Mutation
-………… is a different codon but still encodes for some amino acid.
Missense Mutation
Nonsense Mutation
Silent Mutation
-………… is changes amino acid sequence, but does not alter function of protein
Natural Mutation
Nonsense Mutation
Silent Mutation
…………. Occurs at a site different from the site of original mutation
Natural Mutation
suppressor Mutation
Silent Mutation
………… is any agent that causes a mutation.
Gene
Hereditary
Mutagen
A genetic make-up affects expression of traits is …………
Genetic suppression
Genetic Constitution
Genetic Anticipation
-………… is occurrence of genetic disorder at progressively earlier ages in
subsequent generations.
Genetic suppression
Genetic Constitution
Genetic Anticipation
-………… is process the cell can divided into 2 identical cells like the father cell.
Meiosis
Mitosis
Not of them
What are 3 patterns of sex mosaic may found in Drosophila ?
Antero-posterior
sex mosaic
all of them
Male and female reproductive organs are found in the different flower of same plant is called as
monoecious
dioecious
triple
Passing of traits from parent to offspring
Heredity
Trait
Genetics
………. are any sudden change occurring in hereditary material and can occur naturally
Gene Mutation
Gene
Mutation
what is two types of cell….
somatic cell
germ cell
both of them
In general, genatic disorders are very…..
useful
harmful
rare
Example of pattern of inheritance……
albinism and sickle cell anemia
cystic fibrosis
Both of them
digram of familial relationship and transmition of traits
sex linked
genotype
pedigree
A foetus’ determination of gender is dependent on
mother’s age
father’s health
sperm’s nature
This technique can be used to detect the chromosomal abnormality of an unborn baby
Ultrasound
Amniocentesis
CAT Scanning
In this plant, sex determination was first studied
Mirabilis
Melandrium
Datura
If a boy has sexual characters of that of a girl, its genotype would be
XYY
XO
XXY
The condition of Free martin is observed in
Frog
Rabbit
Goat/sheep
In an entity with genetic composition AA+XXY such as Drosophila will be a normal female. In the case of mammals, it will be?
Turner
Klinefelter
Normal female
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