75-100 генетика

The male sex is heterogametal:

• In man

• On the Black Moth

• In locusts

• In birds

• In pigeons

Signs in combination with sex in a person, located on sex chromosomes:

 

• Male baldness

   

• Male baldness

   

• Gynandromorphism

   

• Blue-eyed

• Hemophilia

A type of sex determination in which the set of sex chromosomes is XX in male individuals and XY in female individuals is characteristic:

• To birds

• To the beetles

• To locusts

• To the fruit fly

• To mammals

   

Flies with different chromosome balance obtained in the experiments of K. Bridges:

• Intermediate signs-intersex

• The half-body is female, the half-body is male-gynandromorphs.

• Flies with lethal genes.

   

• Sterile flies

   

• Flies with mutant genes.

   

Characteristic of the type of inheritance combined with the X chromosome:

• From a sick father, the pathological gene is passed on only to his daughters.

• The ratio of healthy and sick members in the family is equal to 2:1.

• A sick male inherits the pathological gene only from his father.

• All daughters of a sick father will be sick.

• Symptoms appear depending on the number of dominant genes.

is taken into account when compiling genetic maps:

• combination groups.

• coefficient of coefficient

   

• type of hybridization.

• chromosome morphology.

• interference factor.

crossover size:

• indicates the distance between genes

• defines the attachment group

• describes the genetic map

• is calculated by frequency.

• is used for genealogical analysis.

description of the attachment group::

• will be equal to the haploid number of chromosomes of one species

• is characteristic of Independent heredity.

• the number of the attachment group is equal to the diploid set

• is displayed when creating genetic maps

• is determined when conducting Cytological studies.

characteristics characteristic of the crossover phenomenon:

• exchange of the corresponding parts of homologous chromosomes.

• gene exchange of non-homologous chromosomes.

• crossover, the location of the genes does not change.

• the crossover phenomenon was discovered by G. Mendel

• crossover, a new combination of genes is not formed.

non-chromosomal inheritance occurs:

• in plastids

• in body cells.

• In the core.

   

• on chromatin filaments.

• in the nucleolus.