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Medha
Subject: Science
, asked on 23/5/18
How does nails grow after cutting it again and again??
Answer
2
Suraj Shekhar Sahu
Subject: Science
, asked on 25/4/18
Answer questin no 9 immadiately:
9. In poultry, the comb is of four types that is rose comb controlled by dominant gene R, pea comb controlled by a dominant gene P. Single comb when both are dominant. Find out the phenotypic ratio in F
2
generation when a pure breeding rose comb fowl is crossed with pure beeding pea comb cock.
Answer
1
Samartha Maheshwari
Subject: Science
, asked on 17/3/18
Is it necessary that the the violet flower will be the dominant in pea plant, if we take white flowers as W and violet as w then what will be the result?
Answer
6
Manthra Bhaskar 💙🖤🖤ðŸ...
Subject: Science
, asked on 16/3/18
Evolution and classification are interlinked. Explain
Answer
4
Aastha
Subject: Science
, asked on 15/3/18
Can we define genitive drift as genetic variations in small population caused by environmental factors??
Answer
1
Sanchit Mehta
Subject: Science
, asked on 15/3/18
how to trace evolutionary relationship? with ex in context to a animal or bird?
Answer
2
Sanchit Mehta
Subject: Science
, asked on 15/3/18
what factor result in variation?
dna copying error or
mutations or both?
do mutations occur because of dna copying error?
Answer
2
J Jerone Gonsalvez
Subject: Science
, asked on 15/3/18
Ques 17
(a) If we cross pure bred tall (dominant ) pea plant with pure bred dwarf (recessive) pea plant we will get pea plants of F
l
generation. If we now self cross the pea plant of F
1
generation then we obtain pea plants of F
2
generation.
a) What do the plants of F
l
generation look like?
b) State the ratio of tall plants to dwarf plants in F
2
generation.
c) State the type of plants not found in F
l
generation but appeared in F
2
generation mentioning the reason for the same.
d) Mention the genotypes of 2 Different traits related to pea seed.
Answer
3
Siddhi
Subject: Science
, asked on 15/3/18
How many gene sets should a germ cell have
Answer
3
Taniqsha
Subject: Science
, asked on 15/3/18
In a particular species of flowering plant, tall is dominant to short, and flowers with red petals are dominant to flowers with white petals. A tall plant with white flowers (homozygous for both traits) is crossed with a tall plant with red flower (heterozygous for both traits). Show the cross and answer the following a) What will be the genotypes of the parents? b) What are the phenotypic and phenotypic ratios of F1 generation?
Answer
8
Aayushi Rohilla
Subject: Science
, asked on 15/3/18
Give 5 examples of homologous and analogous organs
Answer
1
Romil Singh
Subject: Science
, asked on 15/3/18
Solve this:
With the help of one example for each, distinguish between the acquired traits and the inherited traits. Why are the traits / experiences acquired during the entire lifetime of an individual not inherited in the next generation ? Explain the reason of this fact with an example.
Answer
4
Siddhi
Subject: Science
, asked on 15/3/18
Difference betn natural selection and artificial selection.(3 mark q)
Answer
4
Payal Arora
Subject: Science
, asked on 15/3/18
👇ðŸ»
A mendelian experiment consisted of breeding tall pea plants bearing violet flower with short pea plants bearing white flowers. The progency bore violet flowers but half of them were shot.
(i) What is the genotype of the parents ?
(ii) What is the genotype of the F
1
progency?
(iii) What is the genotype and phenotype of F
2
progency if F
1
progency is cross fertilized.
show it with the help of a flow diagram.
Answer
1
Payal Arora
Subject: Science
, asked on 15/3/18
What’s the difference between heterozygous and hybrids ?
Answer
1
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9. In poultry, the comb is of four types that is rose comb controlled by dominant gene R, pea comb controlled by a dominant gene P. Single comb when both are dominant. Find out the phenotypic ratio in F2 generation when a pure breeding rose comb fowl is crossed with pure beeding pea comb cock.
dna copying error or
mutations or both?
do mutations occur because of dna copying error?
(a) If we cross pure bred tall (dominant ) pea plant with pure bred dwarf (recessive) pea plant we will get pea plants of Fl 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 Fl 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 Fl generation but appeared in F2 generation mentioning the reason for the same.
d) Mention the genotypes of 2 Different traits related to pea seed.
With the help of one example for each, distinguish between the acquired traits and the inherited traits. Why are the traits / experiences acquired during the entire lifetime of an individual not inherited in the next generation ? Explain the reason of this fact with an example.
A mendelian experiment consisted of breeding tall pea plants bearing violet flower with short pea plants bearing white flowers. The progency bore violet flowers but half of them were shot.
(i) What is the genotype of the parents ?
(ii) What is the genotype of the F1 progency?
(iii) What is the genotype and phenotype of F2 progency if F1 progency is cross fertilized.
show it with the help of a flow diagram.