Genetics and Populations
True or false: Natural selection has been observed to create new kinds of organisms. Explain
False. Does not create new, only removes the unnecessary traits
When any organism reproduces, it is what we call the new organism
offspring
who is the founder of genetics
Gregor Mendel
The weaker of the two kinds of alleles
recessive allele
The grid where we determine each possible genetic outcome an offspring may have
Punnett square
A population of foxes migrates into a desert region. the number of foxes with larger ears is mostly likely to......
a. increase
b. decrease
c. remain the same
d. change randomly
A. Increase
The unit that determines traits
gene
The physical appearance of an organism; the expression of its genotype
phenotype
A genotype that contains two of the same allele
homozygous
what is the ratio of water to sugar to make sugar cyrstals?
1:3
random change in the ratio of alleles in a population over time
Genetic Drift
The stronger of the two kinds of alleles
dominant allele
The likelihood of something happening...
Probability
An organism's complete genetic makeup. Or a specific genetic formation, such as a heterozygous form, the lettering that represents the phenotype
genotype
What information do we need before we can fill in a Punnett square?
The genotypes of the parents
process in which organisms with certain adaptations survive to pass on their traits to a greater number of offspring than other organisms
Natural Selection
Blue eyes are a recessive trait. Cross a homozygous recessive mother and a heterozygous father. What are the odds of the child having blue eyes?
75%
What genetic phenomenon is demonstrated if we cross a red flower with a white flower, and produce a pink flower?
incomplete dominance
where do creationist and evolutionist agree on the effects of natural selection?
Natural selection affects populations and that those populations do change when the environment favors certain traits.
use the letter 'b' to represent homozygous dominant
BB
In simple genetics, how often will the heterozygous genotype display the dominant trait?
100% of the time
both traits are present in hybrid offspring, but without blending.
Codominance
Suppose a disease is recessive and only present in individuals who are hh. Cross a HH with Hh. What are the odds of the disease affecting the offspring?
0%