Vocabulary
What is a section of the DNA strand called?
1. Trait
2. Chromosome
2. Chromosome
What is a PUREBRED organism?
An organism that has alleles that are all _______ type- either both dominant for both recessive
1. One
2. Two
ONE
Spiders have 24 chromosomes in each of their body cells. How many do they have in their reproductive cells?
1. 12
2. 48
3. 24
12
What is an observable characteristic of an organism called?
1. Trait
2. Hybrid
1. Trait
What is a HYBRID organism?
A Hybrid organism has 2 _____________ alleles for a trait
1. Same
2. Different
Different
What is asexual reproduction?
Happens when only 1 parent produces offspring.
1. True
2. False
1
What is a SEGMENT of DNA on a chromosome that codes for a specific trait called?
1. DNA
2. Gene
2. Gene
What do we call an allele where the TRAIT ALWAYS shows up in the organism when the allele is present? It is represented with a capital Letter
1. Recessive
2. Dominant
DOMINANT Allele
Sexual Reproduction is when 2 parents produce offspring. It is a combination of both parents
1. True
2. False
1 True
What does HEREDITY mean?
The passing of _______________ from parent to offspring.
1. Genes
2. Traits
Traits
What do we call an ALLELE that is HIDDEN when a dominant allele is present. It is represented by a lowercase letter.
1. Dominant
2. Recessive
Recessive allele
Genetically Modified Food can be helpful because
a. Food crops can be created to be resistant to weed killers and insects
b. Foods can be created to be resistant to extreme temperatures and drought.
c. Both a and b
C
What is a Punnett Square?
A table that can be used to predict what traits ______________ will have based on the traits the parents have.
1. chromosomes
2. offspring
2. offspring
If two HYBRID yellow trees are crossed, what is the probability that the offspring will be yellow?
(What percentage?)
75%
CURLY hair is dominant over STRAIGHT hair. If two STRAIGHT haired parents with genotype cc are crossed, what is the probability that their offspring will be curly?
0%