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D Codominans




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Дата29.07.2012
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Intensity of a pigments of a human skin is controlled with some dominant genes. It is known, that at
augmentation of amount of these genes the pigmentation becomems more intensively. What kind of a gene interaction is observed thus?

  1. Epistasis

  2. Pleiotropj

  3. Polimerj

d) Codominans

e) Complementarity

In maize there are 10 pairs of homologous chromosomes. How many linkage groups does maize have?

a) 20

b) 10

c) 5

d) 2

In medicogenetic consultation has addressed the man concerning bairnenness. In nucleus of the majority of cells
of the epithelium of a mucosa of an oral cavity was revealed Barr's body. The cause ol such state may be:

  1. Turner's syndrom

  2. Trisomy X

  3. Monosomy X

  4. Klineleiter's Syndrom

  5. Trisomy Y

In healthy parents a son sick in phenylketonuria was born. But due to an express diet he has developed normally. What are forms of variability determine his illness and convalescence?

  1. illness with recesfive mutation, convalescence with combinative variability

  2. illness with a chromosome mutation, convalescence with phenotypic variability

  3. illness with doninant mutation, convalescence with modification variability

d) illness with phenocopy, convalescence with modification variability

e) illness with combinative variability convalescence with a phenocopy.

What are the phenotypic effects of trisomy 21?

  1. Down svndrome:

  2. Edwards syndrome:

  3. Patau syndrome;

  4. Turner svndrome;

  5. Klinefcltei svndrome

Mature gamete contains such set of chromosomes:

  1. Haploid

  1. Diploid

  2. Triploid

  3. Tetraploie) Pentaploid

Intensity of a pigmentation of a human skin is controlled with some dominant genes. It is known, that at
augmentation of amount of these genes the pigmentation becomes more intensively. What kind of a gene interaction is observed thus?

  1. Epistasis

  2. Pleiotropy

  3. Polimery

  4. Codominans

  5. Complimentarity

Treesomic, tesselated and translocated terms of the Down's syndrome are known. What, u method will enable
to differentiate these forms of a set of symptoms?

  1. Genealogycal

  2. Biochemical

  3. Cytogenetic

  4. Method of .twins.

  5. Dermatoglyphics

What from the listed diseases of the man arc examples of the modification variability:
a) scurvy

b) albinism

c) quinsy

d) influenza

e) color blindness

Which method of human genetics is used to distinguish hereditary and environmental characters:

  1. Genealogy method

  2. Twin method

  3. Dermatoglyphics

  1. Cytogenetical method

  2. DNA Analysis

Mother and father are healthy. Karyotype of a fetus: 47, XX, +21 was determined by the amniocentesis.
Determine the diagnosis:

  1. Turner's Syndrome

  2. Edward's Syndrome

  3. "Cat cry” syndrom

  4. Down's Syndrome

c) Klinefelter's Syndrom

Trsesomic, tesselated and translocated forms of the Down's syndrome arc known. What a method will enable to
differentiate these forms of a set of symptoms?

  1. Genealogycal

  2. Biochemical

  3. Cytogenetic

  4. Method of twins

  5. Dermatoglyphics

In healthy parents a son sick in phenylketonuria was born But due to an express diet he has developed
normally. What are forms of variability determine his illness and convalescence?

  1. Illness with recessive mutation, convalescence with combinative variability

  2. Illness with a chromosome mutation, convalescence with phenotypic variability

  3. Illness with dominant mutation, convalescence with modification variability

  4. Illness with phenocopy, convalescence with modification variability

  5. Illness with combinative variability, convalescence with a phenocopy.

When the despiralization of chromosomes is carried out?

  1. Interphase

  2. Prophase

  3. Metaphase

  1. Anaphase) Telophase

The result of meiosis is:

  1. 1 haploid eell

  2. 2 haploid cells

  3. 4 haploid cells

  4. 2 diploid cells

  5. 4 diploid cells

In medicogenetic consultation tie woman with the burdened heredity for prenatal diagnostics of a fetus has
addressed. Analysis of amnion's fluid cells on a sex chromatin has shown that cells of a fetus contain 2 bodies of a
sex chromatin (Barrs bodies) What disease is diagnosed for a fetus of the pregnant woman?

  1. Down's Syndrcme

  2. Turner's Syndrome

  3. Pathay's Syndrome

  1. Trisomy X

d) Edward's Syndrome

The woman who during pregnancy had measles rubella has dummy child with unadnation of an upper lip and a
firm palate. A genotype of the child is normal. How such infringement of development refers to as?

a) Pathay's Syndrome » b) Genocopy

  1. Edward's Syndrome

  2. Phenocopy

  3. Chromosomal aberration

In medicogenetic consultation has addressed the ill girl with the initial diagnosis Turner's syndrome. What
method should be used for determination of the final diagnosis?

  1. Genealogical

  2. Hybridizations of nucleic acids

  3. Cytogenetic

  4. Biochemical

  5. Dermatoglyphics

The recessive lethal gen; bonded to X-chromosome (X1) produces a resolution of a blastemal in the person at
early stages of embrvonic development. What is a probable zygote that is not capable to development?

'a) XL Xl b) XL Y C) X1 Y d)XLXL e) Any

During inspection of the patient in his urine and blood have determined presence of pyruvic acid. As a result of
it the diagnosis was put: phenylketonuria. What method of genetics use for this purpose?

a) Genealogycal

b) Biochemical

  1. Cy togenetic

  2. Method of twins

  3. Dermatoglyphics

Inhabitants Zakarpafja frequently are sick of an endemical struma owing to deficiency of iodum in foodstuffs.
Name the form of variability that causes this phenomenon: ,

  1. Mutation

  2. Inheritable

  3. Heritable

  4. Genotypic

  5. Combinational

What will be the phenotypic ration in the first filial generation during test cross, if an analyzing person is heterozygous by one pair of genes ■

  1. 3:1;

  2. 9:3:3:1;

  3. 1:1d)4:l;

e) segregation is absent

Which kind of sex is heterogametic in human being'.'

  1. male

  2. female

  3. male and female

In human genes A and B located in the same autosome. What types of spermatozoons does a man with genotype AB/ab produce in the case of complete linkage?

  1. AB. ab

  2. AB, ab Ab. aB

  3. Ab, aB

How many and which types of gametes are psesence in the person with such genotype: AaBBCcl

a) one: ABC

b) two: ABC, A Bc

  1. three: ABC, ABc, ABC

  1. tour: ABC, A Bc, aBC. aBc

  2. six: ABC ABc, aBC, aBc, abc, Abc

What type of mutations has the greatest probability to be expressed in the next generation:

  1. recessive, linked with a sex. which arises in X-chromosome;

  2. recessive, which arises in autosomes:

  3. dominant autosomic mutation?

What is the karyotype formula for normal females?

  1. 46, XY

  2. 47. XXX

  3. 45, XO

d) 46, XX


Excessive haidness of auricles (hypertrichosis) is determined by the gene that is located in the Y-chromosome.
What probability of birth of the boys with this anomaly if father has this attribute?

a•) 0 %

  1. 25 %

  2. 12, 5 %

  3. 50 %

  4. 100%

Which methods of human genetics are used to diagnose Down syndrome:

  1. Genealogy method

  2. Twin method

  3. Dermatoglyphics

  4. Cytogenetical method

  5. DNA Analysis

The result of final development of spermatogonium is:

  1. 1 spermatozoon

  2. 2 spermatozoon

  3. 3 spermatozoons

  4. 4 spermatozoons

  5. 6 spermatozoons

Mature gamete contains such set ol el i imosomcs

  1. Haploid

  2. Diploid

e) Triploide

  1. Tetraploid

  2. Pentaploid

During inspection of the 8 years girl was determined: an underdevelopmcnt of ovaries, wide shoulders, a fine
bored basin, contraction of the inferiorextremites, "neck ol a sphinx". Mcntal development is not broken. The
diagnosis Turner's syndrome is determined. What amount's infringement of chromosomes is in the patient?

e) Trisomy X h)Trisomy 13

  1. Monosomy X

  2. Trisomy 18

  3. Zerosomy X

What is the genotype of man with the rhesus-negative IV group of blood'.'

a) IAIA RhRh

b) IAI0 Rhrh

c) IBI0 rhrh

d) IAIB Rhrh

e) IAIB rhrh

Owing to influence of a gamma radiation the part of a chromosome is lost. What kind of chromosome mutation
is observed?

  1. Deletion

  2. Duplication

  3. Inversion

  4. lntrachromosomal translocation c)Interchromosomal translocation

When the divergence of chromosomes is carried out?

  1. Interphase

  2. Prophase

e) Metaphase
d) Anaphase
e) Telophase

How many types of gametes are presence in the person with such genotype: AaBbCC?

  1. 2

  2. 4

  3. 8

  4. 3

  5. 5

Allelic genes:

  1. Have the different loci in the homologous cli'omosomcs

  2. Are situated in the non-homologous chromosomes

  3. Are situated in the homologous chromosomes

d) Have the same loci in the homologous chromosomes

Which holandric traits do you know?'

  1. baldness

  2. beard growth

  3. heirs pinnae

  4. ichthyosis

  5. hemophilia

The dominance relationships of the alleles arc follows: A- brown eyes; a- blue eyes. The genes assort independent!) and prescnt in autosomes Write, please, genotype of brown-eyed woman.

a)Aa

b)AA

c)aa

d)XAXA

e)XAXa

What syndromes involving sex chromosome aneuploidv do you know?

  1. Down syndrome

  2. Patau syndrome •

  3. Turner syndrome

  4. Edwards syndrome

  5. Klinefelter syndrome

Which method of human genetics is used to distinguish hereditary and environmental characters:

  1. Genealogy method

  2. Twin method

  3. Dermatoglyphics

  4. Cytogenetical method

  5. DNA Analyses

How many alleles that control blood group has every man has?

  1. one

  2. two

  3. three

  4. four

Which type of the human ABO blood group is example of codominance:

  1. 1(C)

  2. 2 (A)

  3. 3 (B)

  4. 4 (AB)

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