Question

find out the principal involved in herediy of sheep /coat colour​

Answer 1

Answer:

The two genes involved are a gene for white wool, symbolized by W, and a gene for black wool, symbolized by w. Each sheep will have two genes for the color trait.

Answer 2

HI BUDDY HERE IS UR ANSWER

Genetics is the science of heredity. It

seeks to explain differences and similarities exhibited by related individuals.

The application of genetics to livestock

improvement is known as animal breeding.

The objective of this fact sheet is to provide a refresher course on basic genetics

and to show how knowledge of genetics

can be used to improve sheep production.

Basic Principles of Inheritance

Genes are the basic units of inheritance

and, as such, form the link between

generations. Genes are located on microscopic, threadlike structures called

chromosomes. Chromosomes, and thus,

genes, occur in pairs in the nucleus of

all body cells. Each gene pair occupies a

specific location on a particular chromosome pair. Each species has a characteristic number of chromosomes, and all

normal individuals of that species will

have the same number of chromosomes.

In sheep, every body cell contains 27 pairs

for a total of 54 chromosomes. Each of the

chromosomes carries many genes. Genes

are like beads on the various chromosome strings.

Chemically, chromosomes are made

up of DNA (deoxyribose nucleic acid), and

genes are specific portions of the DNA

molecule. Each biochemical reaction

that occurs within an animal’s body is

controlled by a particular gene or set

of genes. Specifically, genes control the

synthesis of proteins, which, in turn,

operate as enzymes in controlling cell

development and function.

Although genes occur in pairs and

both members of a pair act cooperatively

to produce effects in an animal, genes are

transmitted from parent to offspring not

in pairs, but singularly. During the formation of the sex cells, the egg and sperm,

the genes of a pair separate or move apart.

This separation is known as segregation.

As a result, the sex cells each contain only

one member of a gene pair. Which gene

of a pair goes to an egg or sperm is simply

a matter of chance.

When the egg and sperm unite at

fertilization, the genes of a pair recombine in the offspring. In this process, the

sex cells are in effect paired in the body

cells of the offspring. Thus, half of an

individual’s genes come at random from

the sire and half come at random from

the dam. This chance segregation of

genes in the production of sex cells and

their recombination at fertilization is the

main cause of genetic differences among

related individuals.

Inheritance of Wool

Color: An Example

A simple example involving color

inheritance in sheep illustrates the segregation of a gene pair in sex cells and the

subsequent recombination of the genes in

the offspring. For illustrative purposes,

assume a single pair of genes determines

this trait.

PLS MARK ME AS BRAINLIST

#ladybug