Agri Time™ 👩‍🌾📚

CGvyapam 11 Entrance Exams Today News
Right Or Wrong
क्या सच मे जुलाई से होगा शुरू आवेदन की प्रक्रिया
CG PAT, CG PPT, CG Pre MCA, CG PPHT, CG PET, CG Pre B.Ed, CG Pre D.El. Ed etc
👇🏻👇🏻👇🏻👇🏻
https://youtu.be/IaAt6dzKze8n

1.32K views04:03

Agri Time™ 👩‍🌾📚

1.29K views16:52

Agri Time™ 👩‍🌾📚

Forwarded from Deleted Account

CGvyapam 11 Entrance Exams Today News
🥳

सभी 11 परीक्षाओ पर मांगे व्यायाम ने समस्त विभागों से सुझाव, आज की ताजा खबर

CG PAT, CG PPT, CG Pre MCA, CG PPHT, CG PET, CG Pre B.Ed, CG Pre D.El. Ed etc
👇🏻👇🏻👇🏻👇🏻
https://youtu.be/dNlmzX-AAGM

1.26K views03:04

Agri Time™ 👩‍🌾📚

#AGRITIME

Mendelian Genetics or
Mendel’s Law of Inheritance

Mendel’s Law of Inheritance or Mendelian genetics

The basic principles of Genetics were uncovered by an Austrian priest, Gregor Johann Mendel. His experiments consisted of crossing and selfing of the experimental material, Pisum sativum(Garden Pea). The experimental results and generalizations (popularly known as Mendelism) were published in 1866.

Mendel’s law of hereditary are described in his paper “Experiments on plant hybridisation” which was published in the fourth volume of Annual proceeding of Natural History Society of Brunn”

In 1900, Mendel’s paper was simultaneously discovered by three biologists: Hugo de Vries, Carl Correns and Eric von Tschermark. The discovery of Mendelian principles leads to the emergence of a new branch of biology known as Genetics. William Bateson (1905) gave this developing science the name genetics’. Later Johannsen coined the term gene for the hereditary unit that determines observable characters.

@AgriTime

Mendel’s Law of Inheritance or Mendelian genetics

It is a set of primary tenets that underlie much of genetics by G. Mendel In the latter part of 19 th century. He performed monohybrid and dihybrid crosses and gave three principles of inheritance.

Mendel’s three principles of Inheritance are:

1. Law of Dominance
2. Law of Segregation
3. Law of Independent Assortment

1. Law of Dominance

It state that when two individuals of a species, differing in a pair of contrasting characters are crossed, the form of the trait that appears in the F1 hybrid is dominant and the other form that is not expressed is recessive.

In a cross between tall and dwarf garden pea plants in the F1 generation only tall plants are seen. This means that tall form is dominant over dwarf form.

Exceptions to principle of dominance are incomplete dominance and codominance.

2. Law of Segregation

A cross involving contrasting expression of one trait is referred to as mono hybrid cross. For example, in order to learn inheritance of plant height, a tall pea was crossed with dwarf one; all other traits were ignored here. From the results of monohybrid crosses Mendel developed the law of segregation.

It states that hereditary patterns are determined by factors that occur in pairs in an individual but segregate from each other in the formation of gametes so that any one gamete receives one or the other of the paired factors. This principle is also known as the law of purity of gametes.

3. Law of Independent Assortment

A cross in which the parents differ in two pairs of alleles is called a Dihybrid cross
(example-tall green x dwarf yellow).

It states that in the inheritance of two pairs of contrasting characters, the factors of each pair of characters segregate independently of the factors of the other pair of characters.

•IMPORTANCE OF MENDELISM ARE

1. Science of eugenics (development of superior progeny) is based on mendelism.
2. On the basis Mendelism, different breeds in animals and varieties of plants have been produced.
3. On the basis of Mendelism, heterosis has been utilised in different organism.

https://AgriTime

1.47K views08:01

Agri Time™ 👩‍🌾📚

#AgriTime

Multiple Choice Questons On Inflorescence

1.An inflorescence in which flowers arise from different point but reach at same point is known as

a) catkin

b) spadix

c) umbel

d) cymose

2. In raceme the flowers are

a) arranged in basipetal succession

b) arranged in acropetal succession

c) of separate sexes

d) of the same sexes

3. A spike of unisexual flower is found in

a) wheat

b) onion

c) mulberry

d) fig

4. In onion the inflorescence is

a) raceme

b) corymb

c) catkin

d) umbel

5. In musaceae the inflorescence is

a) spadix

b) spike

c) head

d) none of these

6. The inflorescence in Mimosa pudica (touch me not plant) is

a) umbel

b) corymb

c) spike

d) globose head

7. Hypanthodium is a characteristic inflorescence of

a) mulberry

b) Ficus

c) Poinsetia

d) pine apple

8. The inflorescence in Dorstenia

a) amentum

b) coenaanthium

c) anthodium

d) rhiphodium

9. When dichasial cyme ends into monochasial cyme the inflorescence is

a) uniparous

b) biparous

c) cincissus

d) vericillaster

10. Dichasial cyme is seen in

a) Ixora

b) Begonia

c) Calotropis

d) Bignonia

11. Cyathium is found in

a) Ficus

b) Morus

c) Euphorbia

d) Dorstenia

12. Helicoid cyme is found in

a) Dianthus

b) Hamelia

c) Leucas

d) Hibiscus

13. The characteristic inflorescence of the family compositae

a) head or capitulam

b) cymose

c) racemose

d) verticillaster

14. The inflorescence of Anthurium

a) spike

b) racemose

c) hypanthodium

d) spadix

15. The most important function of an inflorescence is to help in

a) dispersal of seeds

b) release of pollen grains

c) attracting insects for cross pollination

d) forming large number of fruits

#Answers:

1-c

2-b

3-c

4-d

5-a

6-b

7-b

8-b

9-d

10-a

11-c

12-b

13-a

14-d

15-c

T.me/AgriTime

Agri Time™ 👩‍🌾📚