Genetics
What does DNA stand for?
Deoxyribonucleic Acid
How is sexual reproduction different from asexual reproduction?
sexual- produces genetically unique offspring
asexual- produces identical offspring (clones)
Some genes can be hidden or covered up by another. They are normally less common in populations. These are considered to be _______?
Recessive genes
When is our unit 8 exam?
**answers will vary
Next Wednesday or Next Thursdy!
Which process of reproduction would result in genetic variation in offspring?
Sexual reproduction
What does it mean when someone says a trait was "inherited" ?
It was passed down from parent to offspring
Many organisms reproduce asexually though a process called 1.__________. Sexually reproducing organisms like us use a process called 2.___________ to for reproduction.
Many of our cells also go through 1.__________, but we use it for growth and development, not reproduction.
1. Mitosis
2. Meiosis
How can these 2 genotypes be described: Hh and tt?
Hh-heterozygous
tt- homozygous dominant
What are the highly organized compact structures of DNA that fits inside of a call's nucleus called?
Chromosomes
What is the "control center" of the cell where DNA is located?
What is the Nucleus
Fragmentation is another form of what kind of reproduction?
Asexual reproduction
A black feathered chicken (BB) is crossed with a black feathered chicken (BB). What percentage of offspring will be black feathered?
100%
What is a probable reason that a trait skips a generation?
The trait is recessive.
How many chromomsomes do humans have?
46 or 23 pair
Two dark brown rabbits have four offspring. Three of the offspring are dark and one is white. What does this tell you about the parents' genes for fur color?
Dark brown is dominant and white fur is recessive. Both parents are heterozygous.
Sonny has a recessive gene for blond hair and marries Mallory who has a heterozygous genotype and brown hair. Sonny and Mallory have a child together, what is the chance that their child will have blond hair?
50% chance the child will have blond hair.
Another word for homozygous
purebred
The physical trait hat is expressed is called a gene's ___________.
Phenotype
The different versions of a gene are called ____?
alleles
The likelihood that a particular event will occur.
probability
What is artificial selection/breeding?
Mating two organisms with a specific trait/gene for the purpose of creating offspring with that desired gene.