Genetics
Heredity
Punnet Squares
Genetic Variation
100
What is genetics?
The study of heredity.
100
What is heredity?
The passage of genetic instructions (traits) from parent to offspring.
100

What does the case (upper vs. lower) of the letters mean in a Punnet Square?

upper - dominant

lower - recessive

100
Are structures that contain hereditary info & transfer it to the next generation; they occur in nearly identical pairs in the nucleus of every cell
Chromosomes
200
Where are genes located?
In the chromosomes
200
Who is considered the founder of genetics?
Gregor Mendel
200

A black chicken (BB) is crossed with a black chicken (BB). What percentage of offspring will be black?

100%
200
The 2 _________ on paired chromosomes constitute a gene. Also they are variations of genes that determine traits.
Alleles
300
What are the threadlike structures of DNA that carry genes called?
Chromosomes
300
What type of organism did Gregor Mendel use to first study heredity?
Pea Plants
300

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%
300
__________ alleles exhibit their effect if they are present on 1 chromosome
Dominant allele
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

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 or heterozygous
400
________ alleles exhibit their effect only when both chromosomes have the allele.
Recessive
500
What do we call the genetic make up of the individual, represented by a set of letters?
Genotype
500
How many chromosomes do humans have?
46 or 23 pair
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.

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 or Heterozygous
M
e
n
u