The phenotypic ratio of Mendelโs dihybrid cross of F2 generation was
Anonymous Quiz
15%
3:1
17%
10:1
64%
9:3:3:1
4%
2:1
โค1
The trait chosen by Mendel for studying inheritance by two genes was
Anonymous Quiz
20%
Stem height and flower colour
52%
Seed shape and seed colour
17%
Flower colour and flower position
11%
Pod colour and pod shape
โค1
What was the phenotype of the F1 generation when Mendel crossed round yellow and wrinkled green seeds?
Anonymous Quiz
16%
All wrinkled green
54%
50% wrinkled and 50% green
18%
All round yellow
12%
50% round and 50% yellow
โค1
How many types of gametes will be produced by an organism having genotype RrYy?
Anonymous Quiz
14%
40
53%
4
23%
20
11%
2
โค1
When two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pair of characters. This is โ
Anonymous Quiz
18%
Law of dominance
40%
Law of segregation
37%
Law of Independent assortment
5%
None of the above
โค1๐ค1
Everyone blooms at their own pace
Thereโs no too early or too late โ
Your time will come, and it will be perfect.
@Adda247Science
Please open Telegram to view this post
VIEW IN TELEGRAM
What are the harmful effects of UV-B radiation?
Anonymous Quiz
13%
Causes aging of skin
25%
Damages the skin cells
18%
Causes skin cancers
44%
All of the above
โค1
In human eye ________ absorbs UV-B radiation.
Anonymous Quiz
24%
Iris
23%
Choroid
40%
Retina
13%
Cornea
Which of the following was signed to control the emission of ozone depleting substances?
Anonymous Quiz
33%
The Earth Summit
35%
The Worldโs Summit
23%
The Montreal Protocol
9%
None of the above
Irrigation without proper drainage of water leads to
Anonymous Quiz
12%
Choking of drains
31%
Solidification of water
20%
Waterlogging in the soil
37%
All of the above
Everyoneโs journey looks different, but all lead to growth.
โฆฟ ๐๐ข๐๐ก โฃ @ADDA247SCIENCE
โฆฟ ๐๐ข๐๐ก โฃ @ADDA247SCIENCE
โค1
This process of evolution of different species in a given geographical area starting from a point and literally radiating to other areas of geography is
Anonymous Quiz
9%
Saltation
30%
Mutation
48%
Adaptive radiation
13%
Branching descent
โค1
Evolution of different species in one area from a single ancestor and spreading to other areas is called:
Anonymous Quiz
7%
Saltation
27%
Mutation
53%
Adaptive radiation
12%
Branching descent
Which statements are correct?
(1) Darwinโs theory = natural selection
(2) Branching descent + natural selection = key concepts
(1) Darwinโs theory = natural selection
(2) Branching descent + natural selection = key concepts
Anonymous Quiz
20%
(1) only
26%
(2) only
51%
(1) and (2)
3%
None
๐ฑ Donโt Do This in Pre-Boards! | Class 12 Strategy to Score 95%+ ๐ฅ
https://youtu.be/kh7hgK3xd5U
https://youtu.be/kh7hgK3xd5U
Whose work on population influenced Darwinโs theory?
Anonymous Quiz
30%
Lamarck
43%
Thomas Malthus
24%
Ernst Heckel
3%
Karl von Baer
Who proposed the concept of saltation (sudden large mutation)?
Anonymous Quiz
33%
de Vries
40%
Miller
15%
Urey
11%
Haldane
๐ค1
This media is not supported in your browser
VIEW IN TELEGRAM
Everyone wants to do everything at onceโฆbut only the consistent one wins ๐Choose focus over chaos.
โฆฟ ๐๐ข๐๐ก โฃ @ADDA247SCIENCE
โฆฟ ๐๐ข๐๐ก โฃ @ADDA247SCIENCE