English

State Mendels Second Law of Inheritance. - Science

Advertisements
Advertisements

Question

State Mendel's second law of inheritance.

Solution

Mendel's second law of inheritance states that 'in the inheritance of more than one pair of traits in a cross simultaneously, the factors responsible for each pair of traits are distributed independently to the gametes.'

shaalaa.com
  Is there an error in this question or solution?
Chapter 4: Heredity and Evolution - Exercise 1 [Page 193]

APPEARS IN

Lakhmir Singh Biology (Science) [English] Class 10
Chapter 4 Heredity and Evolution
Exercise 1 | Q 34.2 | Page 193

RELATED QUESTIONS

A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as:


How is the equal genetic contribution of male and female parents ensured in the progeny?


To perform an experiment to identify the different parts of an embryo of a dicot seed, first of all you require a dicot seed. Select dicot seeds from the following group:
Wheat, Gram, Maize, Pea, Barley, Ground-nut
(A) Wheat, Gram and Pea
(B) Gram, Pea and Ground-nut
(C) Maize, Pea and Barley
(D) Gram, Maize and Ground-nut 


With the help of two suitable examples, explain why certain experiences and traits earned by people during their lifetime are not passed on to their next generations. When can such traits be passed on?


A cross between two individuals results in a ratio of 9 : 3 : 3 : 1 for four possible phenotypes of progeny. This is an example of a ______


In order to ensure that he had pure-breeding plants for his experiments, Mendel :
(a) cross-fertilised each variety with each other
(b) let each variety self fertilise for several generations
(c) removed the female parts of the plants
(d) removed the male parts of the plants.

 

The following results were obtained by a scientist who crossed the F1 generation of pure-breeding parents for round and wrinkled seeds. 

Dominant trait Recessive trait No. of F2 offspring
Round seeds Wrinkled seeds 7524

From these results, it can be concluded that the actual number of round seeds he obtained was ______  


One of the following traits cannot be inherited. This one is :
(a) colour of eyes
(b) colour of skin
(c) size of body
(d) nature of hair


If we pure-bred tall (dominant) pea plant with pure-bred dwarf (recessive) pea plant we will get pea plants of F1 generation. If we now self-cross the pea plant of F1 generation, then we obtain pea plants of F2 generation.

(a) What do the plants of F2 generation look like?

(b) State the ratio of tall plants to dwarf plants in F2 generation.

(c) State the type of plants not found in F1 generation but appeared in F2 generation, mentioning the reason for the same.


____________ refers to the transmission of genetic information from parental generation to next generation.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×