In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosomes is/are :
(i) large chromosome
(ii) small chromosome
(iii) Y chromosome
(iv) X chromosome

(a) (i) and (ii)
(b) (iii) only
(c) (iii) and (iv)
(d) (ii) and (iv)

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Solution

(c) (iii) and (iv)
In human males, the X and Y chromosomes remain unpaired during meiosis.

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Question 6
In human males, all the chromosomes are paired perfectly except one. This/these unpaired chromosome is/are

(i) Large chromosome
(ii) Small chromosome
(iii) Y-chromosome
(iv) X-chromosome

(a) (i) and (ii)
(b) (iii) only
(c) (iii) and (iv)
(d) (ii) and (iv)

Q. In honeybees, females are (i) having (ii) chromosomes and males are (iii) having (iv) chromosomes.

Q. Match Column-I with Column-II and select the correct option from the codes given below.

\begin{matrix} C o l u m n - I & C o l u m n - I I A . & V - s h a p e d a t a n a p h a s e & i) & A c r o c e n t r i c c h r o m o s o m e B . & L - s h a p e d a t a n a p h a s e & i i) & M e t a c e n t r i c c h r o m o s o m e C . & J - s h a p e d a t a n a p h a s e & i i i) & T e l o c e n t r i c c h r o m o s o m e D . & I - s h a p e d a t a n a p h a s e & i v) & S u b - m e t a c e n t r i c c h r o m o s o m e \end{matrix}

Q. Match Column-I with Column-II and select the correct option from the codes given below.

\begin{matrix} C o l u m n - I & C o l u m n - I I A . & V - s h a p e d a t a n a p h a s e & i) & A c r o c e n t r i c c h r o m o s o m e B . & L - s h a p e d a t a n a p h a s e & i i) & M e t a c e n t r i c c h r o m o s o m e C . & J - s h a p e d a t a n a p h a s e & i i i) & T e l o c e n t r i c c h r o m o s o m e D . & I - s h a p e d a t a n a p h a s e & i v) & S u b - m e t a c e n t r i c c h r o m o s o m e \end{matrix}

Q. Select the statements that describe characteristics of genes :
(i) genes are specific sequence of bases in a DNA molecule
(ii) a gene does not code for proteins
(iii) in individuals of a given species, a specific gene is located on a particular chromosome
(iv) each chromosome has only one gene

(a) (i) and (ii)
(b) (i) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)

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In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosomes is/are : (i) large chromosome (ii) small chromosome (iii) Y chromosome (iv) X chromosome (a) (i) and (ii) (b) (iii) only (c) (iii) and (iv) (d) (ii) and (iv)

(c) (iii) and (iv) In human males, the X and Y chromosomes remain unpaired during meiosis.

In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosomes is/are :
(i) large chromosome
(ii) small chromosome
(iii) Y chromosome
(iv) X chromosome

(a) (i) and (ii)
(b) (iii) only
(c) (iii) and (iv)
(d) (ii) and (iv)

(c) (iii) and (iv)
In human males, the X and Y chromosomes remain unpaired during meiosis.