Please enable JavaScript.
Coggle requires JavaScript to display documents.
Chapter 16 (Sexual Reproduction (If one parent is immune to a disease and…
Chapter 16
Sexual Reproduction
If one parent is immune to a disease and passes the trait to the offspring, the offspring will now have this immunity.
Not only works for diseases, but for different factors in the environment, helpful traits, etc.
-
In a way, this is comparable to keeping some money in your wallet, but the rest in your savings account.
-
If the wallet is stolen, a secondary measure can save all of your money from being stolen.
DNA replication
Next, DNA polymerase binds to both parental strands, using them as templates to create daughter strands.
Next, nucleotides line in a 3, 5 sequence using Adenine, Thymine, Cytosine, and Guanine.
First, the DNA "unzips" using an enzyme called helicase.
After completion, the original parent strands bind with the newly created daughter strands.
-
Asexual reproduction
This is disadvantageous due to the fact that using the same genetic material could be defined as "putting all the eggs in one basket."
Thus if a weakness is present in the genetic makeup, it could put all offspring at risk.
Allows for production without a mate, which can be advantegous for isolated organisms.
If a disease can kill an organism effectively, the disease could potentially kill the rest of the species also.
-
Asexual reproduction is good because it is simple, allowing very rapid reproduction.
-
DNA Repair
Genetic diversity is good for species survival, but random, negative alterations are not good for survival.
-
-
Cancer can occur due to DNA mishaps, showing the importance of the repairs.
Punnet squares
Punnet squares, while looking simple, are actually quite important tools when determining traits offspring will receive.
A punnet square organizes mono, Di-Hybrid, and even more complicated crosses into simple to read results.
Test Cross Usefulness
If the genotypes of the parents are known, using a test cross can show what the offspring will be like.
-
-
Tetraploid cells
Tetraploid cells contain four sets of chromosomes. These cells contain more contents of an original cell, due to having to house much more chromosomes.