Do you think these sisters look alike?
Click on image for full size
Courtesy of Corel
You Inherited Your Parents’ Genes!
Aunt Maggie says you have your father's eyes.
Grandma says you have your mother's smile.
Could you actually have the traits from these other people? If you are genetically
related to them then yes, you could. Half of
are from your mother and half are from your father. But you might look more
like one of them than the other. Why is that?
Within each of the trillions of cells
in your body are chromosomes.
Chromosomes come in pairs. You got one chromosome of each pair from your mother
and one from your father. Along each chromosome are genes, one for each trait.
This means that you have two copies of each gene, one from your mother and one
from your father. Both genes of a pair deal with the same trait, but they might
differ in their information about it. For instance, one gene for eye color might
say blue while the other one says brown.
One of those genes wins out and its instructions are carried out. It's
called the dominant gene. The other one is still present but its instructions
are not carried out. It's called a recessive gene. As a custom, people
designate dominant genes with uppercase letters and lowercase genes with lowercase
letters. For example gene "A" is dominant and gene "a"
The genes of an individual are called its genotype. They determine
what it will look like, which is called its phenotype!
Shop Windows to the Universe Science Store!
"Ready, Set, SCIENCE!: Putting Research to Work in K-8 Science Classrooms
", from the National Research Council, provides insight on the types of instructional experiences help K-8 students learn science with understanding. Check our other books
in our online store
You might also be interested in:
Do you look a bit like your brothers and sisters? Do you look a bit like your parents? The similarities are because, unless you were adopted, you and the other members of your family have genetic material...more
Plants, animals and many other species within the domain Eukaryota are able to make offspring, or young, by sexual reproduction. Their offspring are made from gametes. Gametes are special cells that have...more
Jupiter's atmospheric environment is one of strong gravity, high pressure, strong winds, from 225 miles per hour to 1000 miles per hour, and cold temperatures of -270 degrees to +32 degrees (freezing temperature)....more
In July, 1996, it was announced that Dr. David McKay, along with a team of scientists at Johnson Space Center (a division of NASA), had discovered possible fossils of bacteria in a meteorite named ALH84...more
Saturn's atmospheric environment is one of strong gravity, high pressure, strong winds, from 225 miles per hour to 1000 miles per hour, and cold temperatures of -270 degrees to +80 degrees. With winds...more
Titan's atmosphere is a lot like the Earth's, except that it is very cold, from -330 degrees to -290 degrees! Like the Earth, there is a lot of Nitrogen and other complex molecules. There also may be an...more
Autotrophs are organisms that can "make their own food" from an inorganic source of carbon (carbon dioxide) given a source of energy. Most autotrophs use sunlight in the process of photosynthesis to make...more