Question

Which of the following could be evidence that an organism's growth is influenced by the organism's genes? (Hint: Identical twins have identical genes. Non-identical twins have about half the same genes.) Identical twins are more likely to be about the same height than non-identical twins. Identical twins often have slightly different weights at birth. A dog breed can be made smaller by breeding together only the smallest dogs. Children are likely to have friends who are about the same height.

Answer 1

Answer:

From deoxyribo nucliec acid

Answer 2

Evidence that an organism's growth is influenced by the organism's genes is -

• Identical and non-identical twins have same/similar genes but when environmental factors are considered, the growth patterns of even twins may be different.
• If one of the twins plays basketball and the other one sits in the library and studies for hours, then the resulting heights and thoughts of both the twins will be different.
• The genes may affect other characteristics but the twins can be told apart easily.
• Inbreeding of smaller dogs is the right example to show that genes affect the organism's growth. Inbreeding for generations results in incorporation of recessive genes in the progeny and only those traits are expressed then.
• Hence, the inbred progenies are mostly smaller as compared to other individuals of the same species, a few of which may be bigger in size.
• Children having friends with similar height has no scientific basis but rather social characteristics and personal preference.
• Therefore, the right answer is 'A dog breed can be made smaller by breeding together only the smallest dogs'