Genetics
What does X and Y chromosomes determine.
The gender
How are traits passed from parents to offspring?
What is through genes and chromosomes during reproduction?
Some genes can be hidden or covered up by another. These are considered to be-
Recessive
Where is DNA mostly found within a cell?
What is the nucleus
Where are genes located?
What is in the chromosomes or DNA?
What determines the probability of offspring?
What is a Punnett square?
Name two traits that could be inherited from a parent.
What is: hair color, eye color, skin, height, freckles, widows peak.
What do the letters on the outside of a Punnett square represent?
What are the parents of the cross.
What does homozygous mean.
Same, HH, hh
What are the threadlike structures of DNA that carry the genetic codes for traits?
base pairs or A, T, G, C
What is the percentage of offspring when a heterozygous crossed with a heterozygous ?
What is 25% homozygous dominant
50% heterozygous
25% homozygous recessive
is called the “father of genetics”
Gregor Mendel
A black chicken (BB) is crossed with a white chicken (bb). What percentage of offspring will be black?
100% Heterozygous black chickens?
What is a probable reason that a trait skips a generation?
What is recessive?
Inherited traits that children get from their parents come from-
Genes
The different forms or variations of a gene.
What are alleles?
For some traits, only one copy of a particular gene is needed to show a given trait. The gene that always shows up. These genes are referred to as
Dominant
The likelihood that a particular event will occur.
What is probability?
Observable traits that you can see.
What is a phenotype?
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.
Explain Homozygous Dominant and Homozygous Recessive on the Punnett Square.
Draw it.
The probability of a homozygous cross with heterozygous cross.
What is 100% dominant or 50- homozygous and 50-heterozygous.