Question
The current ages of A and B are in the ratio of 4:7. Six
years from now, the ages of B and C will be in the ratio of 2:3. If the average of the present ages of A, B, and C is 44 years, what is the difference between the current ages of A and C?Solution
Let the present ages of A and B are 4x years and 7x years respectively. Age of B after six years = 7x + 6 years Age of C after six years = (7x + 6) × 3/2 = ‘10.5x + 9’ years Present age of C = 10.5x + 9 – 6 = ‘10.5x + 3’ years According to question: 4x + 7x + 10.5x + 3 = 3 × 44 21.5x + 3 = 132 21.5x = 129, x = 6 So the present age of A = 4 × 6 = 24 years Present age of C = 10.5 × 6 + 3 = 63 + 3 = 66 years So the desired difference = 66 – 24 = 42 yearsÂ
The technique of making numerable copies of gene is called as?
Mendel chose ………….. pairs of contrasting characters for his study. In all the above crosses he obtained a definite phenotypic ratio of ………...
Which one of the following is not the law as per genetics?
Which of the following micro organism is used in genetic engineering?Â
Which of the following characters is not typical to class Mammalia?
Sex-influenced traits are autosomal qualities that are impacted by sex. An example of sex influenced traits is
The gene is considered the basic unit of inheritance which are passed from parents to offspring. The alternate form of a gene is termed as
When one single gene starts affecting multiple traits of living organisms, this phenomenon is known as…………………..
...A cross between an inbred line and an open pollinated variety also known as
The type of inheritance in which a sex linked gene is inherited from grandfather to grandson through daughter is called as
