The separating chromosomes during diplotene are held together at one or more points, where breaks and fusion had occured, called as

Suppose on performing reduced error pruning, we collapsed a node and observed an improvement in the prediction accuracy on the validation set. Which among the following statements are possible in light of the performance improvement observed? (a) The collapsed node helped overcome the effect of one or more noise affected data points in the training set (b) The validation set had one or more noise affected data points in the region corresponding to the collapsed node (c) The validation set did not have any data points along at least one of the collapsed branches (d) The validation set did have data points adversely affected by the collapsed node

A

a and b

B

a and d

C

b, c and d

D

all of the above

City High School must put together a debating team consisting of four debaters.There are candidates of equal ability : X,Y and Z who are all seniors; and A,B,C and D who are all juniors..The school requires that there should be two seniors and two juniors in the team.It is also necessary that all of the debaters be able to work with one another. *Debaters Y and A cannot work together. *Debaters Z and C cannot work together. *Debaters A and B cannot work together. which of the following statements must be false? 1.Debaters Y and C are never selected together. 2.Debaters Z and D are never selected together. 3.Debaters Z and D are never selected together.

A

Only I

B

Only II

C

Only III

D

All of these

Consider the following statements regarding supernumerary chromosomes and choose the correct answer:
1. They are not homologous with any of the normal chromosomes
2. They form synapses among themselves
3. They are generally smaller than normal chromosomes
4. They are found more commonly in plants than in animals

A

Only 2, 3 and 4 are correct

B

Only 1, 3 and 4 are correct

C

1, 2, 3 and 4 are correct

D

None of the above

Working together B and C take 50% more number of days than A, B and C together take and A and B working together, take $$\frac{8}{3}$$ more number of days than A, B and C take together. If A, B and C all have worked together till the completion of the work and B has received Rs. 120 out of total earnings of Rs. 450, then in how many days did A, B and C together complete the whole work?

A

2 days

B

4 days

C

6 days

D

8 days

E

10 days

Homologous chromosomes in zygotene pair due to attraction and synaptonemal complex formation. Which of the following is true for diplotene phase?

A

The chromosomes still attract although synaptonemal complex degenerates

B

The synaptonemal complex persistes but chromosomes develop opposite charges

C

The chromosomes repel and completely separate

D

The synaptonemal complex breaks down

The separation of the chromosomes in diplotene stage starts at _________________

A

Telomere

B

Region before telomere

C

Region beside centromere

D

Centromere

What is the normal number of chiasma seen in diplotene chromosomes?

A

2

B

4

C

8

D

16

The chromosomes in oocytes persist in diplotene stage for 12-50 years. State if it is true or false.

A

True

B

False

Assertion (A) Human beings have 23 pair of chromosomes, one of which is the sex chromosomes and the remaining are 22 autosomes. The X-linked disease are related to mutation on a sex chromosomes.
Reason (R) Colour blindness results from a mutation in X-chromosome.

A

Both A and R are true and R is the correct explanation of A

B

Both A and R are true, but R is not the correct explanation of A

C

A is true, but R is false

D

A is false, but R is true

Of the two diploid species, species I has 36 chromosomes and species II has 28 chromosomes. How many chromosomes would be found in an allotriploid individual?

A

42 or 54

B

46 or 50

C

74 or 86

D

84 or 108

The separating chromosomes during diplotene are held together at one or more points, where breaks and fusion had occured, called as

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