1 / 7

The Cell & Inheritance

The Cell & Inheritance. Biology. The Cell & Inheritance. How are chromosomes involved in the inheritance of alleles?. Chromosomes & Inheritance. Observations 23 chromosomes in egg cell and 23 chromosomes in sperm cells

nalanie-kyle
Download Presentation

The Cell & Inheritance

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Cell & Inheritance Biology

  2. The Cell & Inheritance • How are chromosomes involved in the inheritance of alleles?

  3. Chromosomes & Inheritance • Observations • 23 chromosomes in egg cell and 23 chromosomes in sperm cells • How many chromosomes do you think would be found in normal cells and in a zygote (fertilized egg)? Why? • 46 chromosomes (23 pairs) are found in regular cells and in zygotes (fertilized eggs) • How many chromosomes from mom? How many chromosomes from dad?

  4. How does this relate to alleles and genes? • Alleles • Different forms of a gene. • Ex. T and t • How many different alleles or possible forms of a gene do we each have? • Genes are carried from parents to their offspring on chromosomes. • 1 chromosome from mom, 1 from dad • Each chromosome contains a different allele—or form of the gene.

  5. Chromosome Pair Allele from Mom Allele from Dad Both alleles are different forms of the same gene. 23 Chromosome Pairs/46 Total Chromosomes in a Normal Cell 2 Copies/Alleles for Each Gene

  6. Application • The body cells of a grasshopper that you are studying has 24 chromosomes. • How many chromosomes should you find in the grasshopper’s sex cells? • How many alleles for a gene would a grasshopper get from his mother? His father? • If the father had a genotype of Tt, what possible alleles could the offspring receive?

  7. Review Questions • What roles do chromosomes play in inheritance? • On what structure in a cell are genes located?

More Related