Genetic Basics
Punnett Squares
Pedigree Charts
Random
Pedigree Chart Analysis
100
The study of genetics began with observations by...?
a. Gregory Mendel
b. Greg Mendel
c. Gregor Mendel
d. Grace Mendel
Gregor Mendel
100
AA is an example of what kind of genotype?
Homozygous dominant
100
What's a pedigree chart?
A record of the family of an individual; used to study the transmission of a hereditary condition
100
Unaffected parents that can pass on disease/condition are called ________.
Carriers
100
What does a filled-in square represent?
Affected Male
200
Each trait is determined by a pair of parts of DNA called...?
a. genes
b. alleles
c. homozygous
d. heterozygous
Alleles
200
What's the difference between a dominant and recessive trait?
Dominant - trait refers to a genetic feature that "hides" the recessive trait in the phenotype of an individual
Recessive - a trait that is covered over by another form of that trait and seems to disappear
200
Generations are identified by ______ _________.
a. Roman Numerals
b. Arabic Numerals
Roman numerals
200
What % of the offspring in the Punnett square are heterozygous?
50%
200
What does an unshaded circle represent?
Unaffected Female
300
Hair color, height, eye color and freckles are examples of human traits. What do we call the physical expression of the genetic material of an organism?
a. genetics
b. heredity
c. genotype
d. phenotype
Phenotype
300
In pea plants, violet flowers are dominant over white flowers. Cross a heterozygous violet flower with a homozygous recessive white flower.
(Use letter V) One person comes up for the group
V v
v | Vv vv
v | Vv vv
300
If two affected individuals give rise to an unaffected child the affected condition is...?
a. dominant
b. recessive
Dominant
300
What type of letters are used to show a trait is dominant?
Capitol
300
In the second generation-how many people are carriers of the trait?
3
400
State the difference between homozygous and heterozygous.
Homozygous - an organism carrying two copies of the same allele of a gene
Heterozygous - an organism carrying two different alleles of a gene
400
In humans, brown eyes are dominant over blue eyes. If homozygous dominant brown eyes and heterozygous brown eyes were crossed, what percentage of the offspring are going to have blue eyes?
0%
400
If two unaffected individuals give rise to an affected child, the allele for the affected condition is...?
a. dominant
b. recessive
Recessive
400
Magda is a tall, 11-year-old drummer. She has a scar on her right cheek. She is good at swimming. Which of her traits did Magda most likely inherit?
a. height
b. the scar
c. ability to swim
d. ability to play drums
Height
400
4
500
A ________________________ is used to predict the possible genotype from certain parents
Punnett Square
500
Also in humans, no freckles are dominant over freckles. Cross homozygous brown eyes and freckles with homozygous blue eyes and heterozygous freckles. What percentage of offspring are going to have brown eyes with freckles?
50%
500
If two unaffected parents had an unaffected offspring, are they homozygous dominant, heterozygous, or homozygous recessive?
⬤─⬛
❘
◯ ⬛
Heterozygous
500
How many kids did the mother and father from the first generation have?
4
500
This is a recessive disease pedigree. What is the genotype of the male in generation I? (Use the letter r)
Rr