(a) Cousins
(b) Identical twins
(c) Siblings
(d) Fraternal twins
Choose the most appropriate answer from the options given below :
To determine the order of hereditary similarity from increasing to decreasing, we need to understand the genetic relationships among the given options: (a) Cousins, (b) Identical twins, (c) Siblings, and (d) Fraternal twins.
- Identical twins (b): Identical twins are formed when a single fertilized egg splits into two embryos. They share 100% of their DNA, making them genetically identical. Therefore, they have the highest hereditary similarity.
- Fraternal twins (d): Fraternal twins are formed from two different eggs fertilized by two different sperms. They share about 50% of their DNA, similar to any other siblings, but they are conventionally considered closer in genetic similarity immediately after identical twins.
- Siblings (c): Siblings share roughly 50% of their DNA, resulting from the combination of half the genes from each parent. They have a genetic similarity equivalent to fraternal twins.
- Cousins (a): Cousins share about 12.5% of their DNA, as they share one set of grandparents. This degree of relatedness is the lowest among the given relationships.
Based on this information, the order of hereditary similarity from increasing to decreasing is:
- (a) Cousins
- (c) Siblings / (d) Fraternal twins
- (d) Fraternal twins / (c) Siblings
- (b) Identical twins
Given the options, the correct choice is: (b), (d), (c), (a). This option correctly reflects the order of genetic similarity from the most similar to the least similar.
Important Questions from Heredity and Environment - Teaching
- Individual differences in learning are due to ________
- Which of the following has the lasting influence on child's personality development ?
- Which of the following are is true for the cause of Down syndrome?
a. Down syndrome may occur because of a failure of the twenty-first pair of chromosomes to separate during meiosis, so the new individual inherits three of these chromosomes rather than the normal two.
b. Down syndrome may occur because of an extra broken piece of twenty-first chromosome is attached to part of another chromosome.
c. Down syndrome occurs in the pairs of twenty-three chromosomes.
d. Down syndrome occurs because of XYY chromosomes.
Choose the most appropriate answer from the options given below: Which factor mainly refers to genetic traits passed from parents to children?
Which of the following indicates environmental influence?
