The work of gregor mendel
Download
1 / 18

The Work of Gregor Mendel - PowerPoint PPT Presentation


  • 220 Views
  • Uploaded on
  • Presentation posted in: General

The Work of Gregor Mendel. Section 11–1. GENETICS. The scientific study of heredity is called . Genetics. Gregor Mendel’s peas. b. When pollen fertilizes an egg cell, a seed for a new plant is formed. c. Pea plants normally reproduce by self-pollination.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'The Work of Gregor Mendel ' - soledad-munoz


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Genetics
GENETICS

  • The scientific study of heredity is called .

  • Genetics


Gregor mendel s peas
Gregor Mendel’s peas.

b. When pollen fertilizes an egg cell, a seed for a new plant is formed.

c. Pea plants normally reproduce by self-pollination.


The work of gregor mendel

What does it mean when pea plants are described as being true-breeding?

If the plants are allowed to self-pollinate, they would produce offspring identical to themselves.


Mendel the monk
Mendel the Monk true-breeding?

  • To perform his experiments, how did Mendel prevent pea flowers from self-pollinating and control their cross-pollination?

    He cut away the pollen-bearing male parts of a flower and dusted that flower with pollen from another plant.


Traits
Traits true-breeding?

  • Traits

  • Specific characteristics that vary from one individual to another.


Hybrid
Hybrid true-breeding?

  • Hybrid

  • The offspring of crosses between parents with different traits.


Genes
Genes true-breeding?

  • Genes

  • Chemical factors that determine traits


Alleles
Alleles true-breeding?

  • Alleles

  • The different forms of a gene


Principle of dominance
Principle of Dominance true-breeding?

  • State the principle of dominance.

  • Some alleles are dominant and others are recessive.


Dominance vs recessive
Dominance vs. Recessive true-breeding?

  • Is the following sentence true or false?

  • An organism with a recessive allele for aparticular form of a trait will always exhibit that form.

  • False


Dominance vs recessive1
Dominance vs. Recessive true-breeding?

  • Circle the letters of the traits controlled by dominant alleles in Mendel’s pea plants.

  • a. tall

  • c. yellow


Segregation
Segregation true-breeding?


Mendel s experiment
Mendel’s Experiment true-breeding?

How did Mendel find out whether the recessive alleles were still present in theF1 plants?

  • He allowed the F1 plants to produce an F2 generation by self-pollination.


Mendel s experiment1
Mendel’s Experiment true-breeding?

  • About one fourth of the F2 plants from Mendel’s F1 crosses showed the trait controlled by the allele.


Mendel s experiment2
Mendel’s Experiment true-breeding?

  • Circle the letter of each sentence that is true about Mendel’s explanation of the results from his F1 cross.

  • Mendel assumed that a dominant allele had masked the corresponding recessiveallele in the F1 generation.

    d. At some point, the allele for shortness was segregated, or separated, from the allelefor tallness.


Genetics1
Genetics true-breeding?

  • What are gametes?

  • They are the sex cells.


Segregation of alleles
Segregation of Alleles true-breeding?

In the diagram above, the dominant allele is represented by T and the

recessive allele is represented by t .


ad
  • Login