Show:
Genetics
Heredity
Patterns of Inheritance
Punnet Squares
Misc
100
What is genetics?
The study of heredity.
100
What is heredity?
The passage of genetic instructions (traits) from parent to offspring.
100

A pattern of inheritance in which one allele is only partially dominant

incomplete dominance

100
Some genes can be hidden or covered up by another. These are considered to be-
Recessive
100
How are traits passed from parent to offspring?
Through genes during reproduction
200
Where are genes located?
In the chromosomes
200
Who first studied heredity and the passage of traits from one generation to the next?
Gregor Mendel
200

Traits that have 3 or more phenotypes may be a result of ____________.

multiple alleles

200
What is the punnet square used for?
To determine the outcome of genetic crossings.
200
Name two traits that could be inherited from a parent?
Examples: hair color, eye color, height, skin color, freckles, etc...
300
The sorting of chromosomes during sexual reproduction, determines -
Which traits are passed on to the offspring
300
What type of organism did Gregor Mendel use to first study heredity?
Pea Plants
300

How is codominance different from incomplete dominance?

Codominance happens when two alleles are expressed equally. Incomplete dominance happens when one allele is only partially dominant.

300
A black chicken (BB) is crossed with a black chicken (BB). What percentage of offspring will be black?
100%
300
For some traits, only one copy of a particular gene is needed to show a given trait. These genes are referred to as-
Dominant
400
Inherited traits that children get from their parents come from-
Genes
400
The physical trait observed in an offspring is known as it's -
Phenotype
400

Which pattern of inheritance could account for human height? Explain.

Polygenic inheritance due to the wide range of human height phenotypes.

400
Having dimples is dominant (D). Not having dimples is recessive. (d) Both parents are heterozygous for the dominant trait. What percentage of the children will NOT have dimples?
25%
400
Why does a Punnet Square use capital and lowercase letters?
Capital = Dominant Trait Lower Case = Recessive Trait
500
What do we call the genetic make up of the individual, represented by a set of letters?
Genotype
500
How many chromomsomes do humans have?
46 or 23 pair
500

What pattern of inheritance controls human blood type? How can you tell?

Multiple alleles. You can tell from the several different phenotypes and genotypes that can be produced.

500
Long ears are dominant (E) in rabbits. If one parent is homozygous dominant for the long ear trait and the other homozygours reccessive (e), what is the only possible genotype of the offspring?
Ee
500
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.