Genetics
What is genetics?
The study of heredity.
How are traits passed from parents to offspring?
Some genes can be hidden or covered up by another. They are normally less common in populations. These are considered to be _______?
Recessive genes
Where is DNA mostly found within a cell?
In the nucleus
What process of reproduction would result in genetic variation in offspring?
Sexual reproduction results in genetic variation.
What determines the pattern of a tiger's stripes?
The genes they receive from their parents.
Name two traits that could be inherited from a parent.
What is: hair color, eye color, skin, height, freckles, widows peak.
What is the Punnett square used for?
To predict the outcome of genetic crossings.
How can these 2 genotypes be described: Hh and tt?
Hh-heterozygous
tt- homozygous recessive
What is the structure in a cell’s nucleus that contains hereditary material (DNA) called?
Chromosomes
What is the process in which one diploid cell divides to make four haploid sex cells?
Meiosis
This process of reproduction does not use meiosis and creates offspring with an exact copy of DNA.
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.
Inherited traits that children get from their parents come from-
Genes
The different versions of a gene are called ____?
alleles
What percentage of offspring are likely to represent the homozygous recessive phenotype from the following parents:
Parent 1 (Rr)
Parent 2 (rr)
50% of offspring
What are the parent genotypes if the following four offspring genotypes are possible:
BB Bb
Bb bb
Parent 1: Bb
Parent 2: Bb
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.
An organism that always produces offspring with the same form of a trait as the parent.
purebred or homozygous