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Answered on 02 Feb CBSE/Class 12/Science/Biology Tuition/Class XI-XII Tuition (PUC)

Sujoy D.

Tutor

Base = ValineAcid = Glutamic acid.
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Answered on 10 Feb CBSE/Class 12/Science/Biology Tuition/Class XI-XII Tuition (PUC)

Veerababu Shetti

In point mutation only the change(or)substution of single base And in the frame shift mutation addition or delition of base pairs occure it result total sequence changes and point mutation leads to frame shift mutation
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Answered on 02 Feb CBSE/Class 12/Science/Biology Tuition/Class XI-XII Tuition (PUC)

Sujoy D.

Tutor

(i) Both the chromosomes as well as Mendelian factors (whether dominant or recessive) are transmitted from generation to generation in an unaltered form. (ii) A trait is represented by only one Mendelian factor inside a gamete. A gamete similarly contains a single chromosome out of a pair of homologous... read more

(i) Both the chromosomes as well as Mendelian factors (whether dominant or recessive) are transmitted from generation to generation in an unaltered form. (ii) A trait is represented by only one Mendelian factor inside a gamete. A gamete similarly contains a single chromosome out of a pair of homologous chromosomes due to meiosis that occurs before the formation of gametes.

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Answered on 11 Feb CBSE/Class 12/Science/Biology Tuition/Class XI-XII Tuition (PUC)

Name the most invasive aquatic plant weed which is called as Terror of Bengal.

Piyanjali C.

Life science professional

Water hyceinth is the aquatic plant which was first introduced in west bengal by the british people because of its beauty.Once it came to the water body it started compete with teh native species and causes their disappearence from the water environment.it can spread fast even.Also it can reduce the... read more

Water hyceinth is the aquatic plant which was first introduced in west bengal by the british people because of its beauty.Once it came to the water body it started compete with teh native species and causes their disappearence from the water environment.it can spread fast even.Also it can reduce the oxygen availability to the other water species causes the death of the water bodies.Since the ill effect of the water hyceinth seen first in the west bengal and also introduced therir first so called as the "the Terror of bengal".

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Answered on 17 Feb CBSE/Class 12/Science/Biology Tuition/Class XI-XII Tuition (PUC)

Give the scientific name of a plant which came to India as a contaminant with imported wheat and causes pollen allergy.

Suneel Yadav

Tutor

Carrot grass
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Answered on 16 Feb CBSE/Class 12/Science/Biology Tuition/Class XI-XII Tuition (PUC)

What kind of structures is formed at the end of microsporogenesis and megasporogenesis?

Ramya

Primary Teacher

The structure formed at the end of microsporogenesis is pollen grain(male gametophyte) The structure formed at the end of megasporogenesis is embryo sac(female gametophte).
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Answered on 08 Mar CBSE/Class 12/Science/Biology Tuition/Class XI-XII Tuition (PUC)

Which are the nuclei that fuse to form endosperm?

Shanthala

Two polar nuclei and 2nd male gamet( nuclei of generative cell)
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Answered on 26 Feb CBSE/Class 12/Science/Biology Tuition/Class XI-XII Tuition (PUC)

Why is process of fertilization in flowering plants referred to as double fertilization?

Garry Nikhla

Trainer

The two male gametes(Anther)are being transport towards the ovary of flowering plants , one haploid male gamete fuse with one female haploid egg cell leading to formation of a zygote which is diploid. Another haploid male gamete fuses with the secondary nucleus which is diploid producing a triploid... read more

The two male gametes(Anther)are being transport towards the ovary of flowering plants ,  one haploid male gamete fuse with one female haploid egg cell leading to formation of a zygote which is diploid. Another haploid male gamete fuses with the secondary nucleus which is diploid producing a triploid Endoplasm. Since two process of fertilization takes  placesimultaneously in flowering plants , hence Double Fertilization..

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Answered on 27 Feb CBSE/Class 12/Science/Biology Tuition/Class XI-XII Tuition (PUC)

What is a test cross?

Om Prakash Vinyak Chambhare

I conquer my abilities by polishing my strengths and improving on weaknesses.....

Test cross is a cross between F1 generation and recessive parent. eg when a cross between pure tall plant (TT) and pure dwarf plant (tt) then F1 generation (all progeny) are tall whose genotype is Tt. From the above information, a cross between Tt (F1) and tt (recessive parent) is a test cross. Ratio... read more

Test cross is a cross between F1 generation and recessive parent.

eg when a cross between pure tall plant (TT) and pure dwarf plant (tt) then F1 generation (all progeny)  are tall whose genotype is Tt.

From the above information, a cross between Tt (F1) and tt (recessive parent) is a test cross.

Ratio : 1:1

50% tall : 50% dwadw 

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Answered on 15 Feb CBSE/Class 12/Science/Biology Tuition/Class XI-XII Tuition (PUC)

Mention the function of non-histone protein.

Ramya

Primary Teacher

In chromatin, those protein which remain after the histone proteins are called non histone proteins. Scaffold proteins, DNA polymerase, heterochromatin protein 1 and polycomb are the non histone proteins. The Non histone proteins have three important roles in maintaining structure of chromosomes during... read more

In chromatin, those protein which remain after the histone proteins are called non histone proteins. Scaffold proteins, DNA polymerase, heterochromatin protein 1 and polycomb are the non histone proteins. The Non histone proteins have three important roles in maintaining structure of chromosomes during cell division. These are

(1) chromosome condensation 
(2) sister chromatid separation at the metaphase: anaphase transition and

(3) interaction between chromosomes and cytoskeletons during formation of mitotic spindles and cleavage furrow.

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