Tag: linkage and crossing over

Questions Related to linkage and crossing over

A DNA molecule measures 204 nm in length; 35% of the molecule has AT base pairs. Find out the number of H-bonds existing between the two strands of DNA.

biology inherited changes linkage and crossing over linkage and recombination genetics: inheritance

  1. 1590

  2. 159

  3. 1410

  4. 141

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Correct Option: A

What is the probability of three daughters to a couple in three children?

biology inherited changes linkage and crossing over linkage and recombination genetics: inheritance

  1. $\dfrac{1}{4}$

  2. $\dfrac{1}{8}$

  3. $\dfrac{1}{16}$

  4. $\dfrac{3}{8}$

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Correct Option: A

A family has five girls and no son, the probability of the occurrence of son in $6^{th}$ child is?

biology inherited changes linkage and crossing over linkage and recombination genetics: inheritance

  1. $1/2$

  2. $1/5$

  3. $1$

  4. No chance

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Correct Option: A

Find out the frequency of AabbCcDdee if parents are AabbCCddEe and AabbccDdee.

biology inherited changes linkage and crossing over linkage and recombination genetics: inheritance

  1. $0.78\%$

  2. $12.5\%$

  3. $25\%$

  4. $50\%$

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Correct Option: A

A family of five daughter only is excepting sixth issue. The change of its beings a son is?

biology inherited changes linkage and crossing over linkage and recombination genetics: inheritance

  1. $0\%$

  2. $25\%$

  3. $50\%$

  4. $100\%$

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Correct Option: C
Explanation:

If you have five girls and expect a sixth child, then there is a  chance that it will be a boy slightly more than 50%.

So, the correct option is '50%'.

A human male is heterozygous for two autosomal genes A & B and homozygous dominant for 3rd autosomal gene C. The individual is having sry gene (S) on its Y-chromosome. What will be the probability of sperms to carry abcS condition? 

biology inherited changes linkage and crossing over linkage and recombination genetics: inheritance

  1. $\frac{1}{4}$

  2. $\frac{1}{8}$

  3. $0$

  4. $\frac{1}{16}$

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Correct Option: A

Assume that the occurrence of nitrogen bases in adjacent positions in a DNA strand is random. Identify the minimum number of nucleotides in a DNA strand where GAAT can occur once on the basis of probability

biology inherited changes linkage and crossing over linkage and recombination genetics: inheritance

  1. 512

  2. 256

  3. 4096

  4. 1024

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Correct Option: B

Assume that the occurrence of nitrogen bases in adjacent positions in a DNA strand is random. Identify the minimum number of nucleotides in a DNA strand where GAAT can occur on the basis of probability.

biology inherited changes linkage and crossing over linkage and recombination genetics: inheritance

  1. $512$

  2. $256$

  3. $4096$

  4. $1024$

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Correct Option: A

Probability of getting fairly light and light progeny from mulattoe and albino parents in

biology inherited changes linkage and crossing over linkage and recombination genetics: inheritance

  1. $\cfrac{15}{64}$ and $\cfrac{6}{64}$

  2. $\cfrac{20}{64}$ and $\cfrac{15}{64}$

  3. $\cfrac{3}{8}$ and $\cfrac{1}{8}$

  4. $\cfrac{3}{8}$ and $\cfrac{3}{8}$

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Correct Option: A

In an organism punk is a sex-linked recessive trait and black hair heterozygous female is mated to white male which is not spotted, the phenotypic ratio of the offspring would be :

biology inherited changes linkage and crossing over linkage and recombination genetics: inheritance

  1. 1/4 spotted black; 1/4 pink spotted white; 1/4 unspotted black; 1/4 uspotted white

  2. 1/2 spotted black; 1/2 pink spotted white

  3. 3/4 pink spotted black; 1/4 pink spotted white

  4. 3/4 unspotted black; 1/4 pink spotted white

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Correct Option: A