The study of heritable changes in gene activity which are not caused by changes

Question

The study of heritable changes in gene activity which are not caused by changes in the DNA sequence is referred to as. Pose chromosomal inheritance Epigenetics Pre chromosomal inheritance Polygenetics The correct term for the evolutionary change in the timing of developmental events is. Paedochrony Alternochrony Homochrony Homochrony Heterochrony While multiple studies have provided evidence that animals can recognize and respond to kinship ties; it has not yet been demonstrated in plants. True False

Explanation / Answer

Question 27: Epigenetics is defined is the study gene expressions that are heritable without changes in DNA sequence. The epigenetics deals with intricate mechanisms involved in the modification of chromatin proteins and methylation/demethylation of the cytosine residues within DNA. The enzymes involved are HMT’s (Histone methyl transferases) and HDAC’s (Histone deacetylases).

Therefore, the correct option is b) Epigenetics

Question 28: The evolutionary change in the timing of developmental events that causes changes in the in the size and shape of an organism is known as heterochrony. There are two major parts of heterochrony involved:

1.      Operational process rate

2.      Onset and offset of process

Therefore, the correct option is d) heterochrony .

Question 29: Kinship is defined as the capability of an organism to differentiate between its own kin and non-kins, this give usually reproductive success to an organism. Kinship ties in animals are proved by established scientific evidences which is not so in plants.

The correct option is : True

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.