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An organism having two different alleles for a trait is called a. heterozygote

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The phenotype of an organism a. represents its genetic composition b. reflects all the traits that are actually expressed c. occurs only in dominant pure organisms d. cannot be seen. An organism having two different alleles for a trait is called a. heterozygote

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Presentation Transcript
slide1
The phenotype of an organism a. represents its genetic composition b. reflects all the traits that are actually expressed c. occurs only in dominant pure organisms d. cannot be seen
slide2
An organism having two different alleles for a trait is called

a. heterozygote  

b. homozygous dominant    

c. genotype   

d. monohybrid cross

slide3
If an individual possesses two recessive alleles for the same trait, the individual is said to be a. homozygous for the trait            

b. haploid for the trait c. heterozygous for the trait          

d. mutated

slide4
Mendel hypothesized that each trait is controlled by a factor, now called a

a. gene    

b. mate  

c. hybrid   

d. dominance

slide5
T = Tall t = short

Give the genotype for each gene combination:

TT:

tt:

Tt:

Homozygous dominant

Homozygous recessive

Heterozygous

slide6
R = round r = wrinkled

Give the allele combinations for the following

genotypes:

  • Heterozygous round seeds
  • Homozygous round seeds
  • Wrinkled seeds

Give the phenotypes for the following

genotypes:

4. RR

5. Rr

6. rr

Rr

RR

rr

Homozygous dominant

Heterozygous

Homozygous recessive

slide7
Which sequence shows the most complex structure to the least complex structure?
  • gene – DNA – chromosome
  • DNA – gene – chromosome
  • gene – chromosome – DNA
  • chromosome – gene – DNA
slide8
1. Combining DNA from two different organisms is an example of

2. Combining the desirable qualities of 2 different organisms into one is referred to as

3. The process in which genetically identical offspring are produced by using the cells of an organism is called

genetic engineering

selective breeding

cloning

slide9
1. The type of selective breeding in which organisms with different traits are crossed is called

2. The type of selective breeding in which organisms with similar traits are crossed to preserve the trait is called

Hybridization.

inbreeding.

slide10
What does structure A represent?
  • What technique is illustrated in the diagram?
  • 3. What is this technique used for?

Gene / DNA

Genetic engineering

To produce insulin, growth hormone, clotting factors, genetically modified foods

slide11
The letter X most likely represents (1.)   bacterial cells that are unable to synthesize insulin (2.)   human cells that are able to synthesize antibodies (3.)   bacterial cells that are able to synthesize insulin (4.)   human cells that are unable to resist antibiotics
  • What is this process an example of?

Genetic engineering

slide12
Genetic engineering has been utilized for the production of
  • salivary amylase
  • human growth hormone
  • hydrochloric acid
  • uric acid crystals
slide13
When humans first domesticated dogs, there was relatively little diversity in the species. Today, there are many variations such as the German shepherd and the dalmation. This increase in diversity is most closely associated with
  • cloning of selected body cells
  • selective breeding
  • mitotic cell division
  • environmental influences on inherited traits
slide14
Is this a karyotype of a male or female? How do you know?

Male

Males have the X and Y sex chromosomes

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