Download Name - CLC Charter School

Name: _____________________________
This study guide is based on information from http://www.dnaftb.org/dnaftb/1/concept/
Children resemble their parents (1).
Read the CONCEPT part of this section and then answer the following questions.
1. In 1865, a monk named __________________ completed experiments that showed that traits
are passed from parents to their children.
2. Later on, scientists discovered that these traits were caused by ________ that are inherited
from parents.
Look at the ANIMATION for this section and then answer the following questions.
1. Gregor Mendel chose to work with _______ plants.
2. He chose this kind of plant because they had many ______ that could distinguish strains of
pea plants from each other, they were ______ to grow and the traits could be tracked from one
_____________ to the next.
3. ______ fertilization happens when a pistil is fertilized by pollen from the same plant.
4. ______ fertilization happens when a pistil is fertilized by pollen from another plant.
Look at the PROBLEM for this section and then answer the following question.
Describe how you can develop a pure-bred colored flower plant.
Genes come in pairs (2).
Read the CONCEPT part of this section and then answer the following questions.
1. Mendel focused on ________ individual traits that he could easily identify.
2. Each trait had _____ alternative forms. For example, seed color could be _____ or ______.
3. He discovered that alternative forms of a _ determine each alternative form of a trait.
Look at the ANIMATION for this section and then answer the following questions.
1. The visible trait is called a _________________.
2. For example, the visible stem trait is that the stem could be ______ or _______.
3. A visible pod trait is that the pod could be _________ or __________.
4. A seed trait is that the seed could be __________ or ____________.
5. The pair of alleles is called the ______________.
Look at the PROBLEM for this section and then answer the following question.
Describe how you can develop a pure-bred colored flower plant.
Genes don’t blend (3).
Read the CONCEPT part of this section and then answer the following questions.
1.
When Mendel cross pollinated a green seed plant with a yellow seed plant, the new
plants always had ______ color seeds.
2.
There was no blending of colors. The _____ color seemed to have disappeared.
Look at the ANIMATION for this section and then answer the following questions.
1. Can yellow seed plants and green seed plants be blended together to make yellow-green seed
plants? _____
2. A tall plant and a short plant do not make an __________ height plant.
3. Only one of the traits can be seen in the hybrid ____________.
Some genes are dominant (4).
Read the CONCEPT part of this section and then answer the following questions.
1. A purebred plant only has one kind of gene. A hybrid plant has ______ kinds of gene
alternatives (i.e. green and yellow).
2. The dominant gene will be seen in a plant that is purebred dominant plant and in a hybrid
plant.
3. The ____________ gene will only be seen in a purebred recessive plant. This purebred
recessive plant is created when an offspring inherits a copy of the recessive gene from each
parent.
Look at the ANIMATION for this section and then answer the following questions.
1. What are the two alleles for pea color? ___________ and _________________
2. Which is the dominant color? ____________
3. Which is the recessive color? ____________
4. What are the two possible combinations of alleles of a yellow pea? ______ or ______
5. _____ is called a homozygous pair of alleles.
6. _____ is called a heterozygous pair of alleles.
Look at the PROBLEM for this section and then answer the following questions.
What happens in the first generation of offspring when you combine a pure-bred dominant plant with
a pure-bred recessive plant?
What happens in the second generation of offspring when you combine two of the first generation
plants?
Genetic inheritance follows rules (5).
Read the CONCEPT part of this section and then answer the following questions.
1. Each trait is determined by a pair of ________.
2. Offspring get one gene from their ______ and one gene from their ______.
3. The gene ratio that happens when crossing two hybrid parents is ____ to _____.
Look at the ANIMATION for this section and then answer the following questions.
1. What is Mendel’s law of segregation?
2. Make a Punnett square to show a cross between two hybrid yellow seed plants.
3. Write the genotype and phenotype for each type of offspring.
a.
b.
c.
What kind of genes do you have?
Trait
Dominant
Possible
Recessive
Recessive
Someone else
Phenotype
Dominant
Phenotype
Genotype
who has the
Genotypes
same
phenotype as
you do.
Color of iris
Not blue
BB or Bb
Blue
Widow’s peak
Peak
No peak
Cheek dimples
Dimples
No dimples
Face freckles
Freckles
No freckles
mid-digital hair
Hair
No hair
Hitchhiker’s
Straight
Curved
Long 2nd toe
Long big toe or
thumb
Hallux length
= to 2nd toe
(toes)
Ear lobes
Free
Attached
Tongue rolling
Ability
No ability
Cleft chin
Cleft
No cleft
Bb