Change in Populations Irelyn Anderson

Natural selection

How does natural selection affect single gene and polygenic traits within populations?

Natural selection on single gene traits can lead to changes in allele frequencies and changes in genotype frequencies.

Birds with different sized beaks are affected by the size food they eat. Small beaks need smaller food and bigger beaks need bigger food. It depends on their environment.
Frogs with different sized tongues depends on how much flies they get for food. If they have longer tongues they can get more flies and vise versa for smaller tongues.
Lizards colors determine on how long they will live. If they are darker colored they will blend in and most likely not be caught. If they are a bright color they will get caught by predators easier.
Monkeys with different sized tails depend on how far they can get places. Shorter tails will be harder and longer tails will be easier.
The size legs of animal depends on how fast the gazelles run. If they're longer they'll go faster and shorter they'll go slower.
Cacti spike size depends on their survival. Bigger lives longer and smaller lives shorter.
The closer the daisies are to bee hives are more likely of survival. If they are far from bees they will die faster because of lack of pollination.
The lighter the color of the flowers the more likely sun will not hit them as much. The darker the flowers the more likely of sunlight reaching the flower.
If trees have bad soil, they won't survive as much as the others would. They need good soil to survive as long as they should.
The length and thickness of tree roots depend on how long the trees will stand up. It needs more support so It can survive against storms, or any natural weather.
Bacteria causes illness but is easy to get rid of using antibiotics. If not caught soon enough, the results could be fatal.
Viruses cause illness and there is no cure for it. No medicine can help this and the body just has to fight the virus off to get rid of the bacteria.
Fungi is a type of microbe that is a mushroom and can help bake bread, recycle and decompose waste.
Protista is a type of microbe that produces oxygen that we breathe and without it, the world could start to die. It helps maintain the balance of microbial balanced life.
Archaea is a bacteria look alike and are living fossils that provides clues to the early life of the earth. Without it we would not know evolution.


Created with images by Freeimages9 - "flower orchid tropical" • brian.gratwicke - "Toad Mountain Harlequin frog (Atelopus certus) Female left, male right. This species is now secure in captivity and has recently been captive-bred for the first time by Dr. Ibanez and his team." • PabloBM - "Brightly beaked toucan" • koudy-vw - "Frog" • Maciej Kraus - "Lizard" • Storm's - "Cute Monkey" • shankar s. - "Thomson's gazelle" • GLady - "zinnia red flower" • Phoenix Area Homes by Tom Weiskopf PLLC - "Saguaro Cactus" • jcnapw - "Daisy" • Flower's.Lover - "Flowers" • crows_wood - "Tree" • SFB579 Namaste - "Roots" • NIAID - "Methicillin-Resistant Staphylococcus aureus (MRSA)" • geralt - "koli bacteria escherichia coli bacteria" • Razza Mathadsa - "Virus" • Muffet - "fungi" • James St. John - "Porites astreoides (mustard hill coral) (San Salvador Island, Bahamas) 11" • jurvetson - "Extremophiles"

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