Answer:
78 chromosomes
Explanation:
Since the number of chromosomes in a dog are diploid, we have 2n chromosomes where n = number of chromosome pairs.
Since n = 39.
The number of chromosomes is 2n = 2 × 39 = 78 chromosomes
So, a dog has 78 chromosomes.
The best and most correct answer among the choices provided by the question is the fourth choice "<span>Crossing over during metaphase allows segments of DNA from 2 parents to SWAP and produce non-identical haploid cells."</span><span>
</span>Mutations are changes in the DNA. A single mutation can have a large effect, but in many cases, evolutionary change is based on the accumulation of many mutations. Gene<span> flow is any movement of </span>genes<span> from one population to another and is an important source of</span>genetic variation<span>.</span>
I hope my answer has come to your help. God bless and have a nice day ahead!
The answer is A. Oligotrophic lakes are clear and hence
have little vegetation in them (hence no net primary production) that
could initiate the process of eutrophication. Eutrophication is brought about when bacteria
break down the high amount of organic matter hence reduce the oxygen supply in
the waters.
Tachycardia is a condition of a heart that beats very fast
Answer:- They are coelemate
-The body is covered with thin curticle
-They are triploblastic
-The have long and segment bodies
-Annelidas are bilaterally symmetrical
