Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during...
-
Upload
lesley-holmes -
Category
Documents
-
view
215 -
download
0
Transcript of Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during...
![Page 1: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/1.jpg)
Human Heredity14-1BIO 1004
Flora
![Page 2: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/2.jpg)
Scientists take pictures the complete set of chromosomes during cell division.
They then place all of the chromosomes next to each other A picture of chromosomes arranged in this way
is a karyotype One listed on page 341 is a result of
fertilization and formation of the zygote with 46 chromosomes
Human Chromosomes
![Page 3: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/3.jpg)
Two of the chromosomes out of the 46 are known as sex chromosomes, because they determine an organisms sex
X chromosomes are much larger that the Male Y chromosome
The remaining 44 chromosomes are known as autosomal chromosomes
Cont.
![Page 4: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/4.jpg)
All human eggs carry X chromosomes Sperm….on the other hand carry 50% X
chromosomes and 50% Y chromosomes This ensures a 50/50 split between the sexes
Gametes and Chromosomes
![Page 5: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/5.jpg)
Pedigree Charts – chart which shows the relationships within a family
Symbols: Circles – female Squares – male
Human Traits
![Page 6: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/6.jpg)
![Page 7: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/7.jpg)
![Page 8: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/8.jpg)
![Page 9: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/9.jpg)
![Page 10: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/10.jpg)
![Page 11: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/11.jpg)
![Page 12: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/12.jpg)
![Page 13: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/13.jpg)
Some of the most obvious human traits are impossible to associate with a single gene
Some traits are not genetic at all……even height is largely impacted by nutritional during the body’s development Ex: Europe since 1880’s Genes can be expressed solely due to residing
in favorable conditions
Genes and the Environment
![Page 14: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/14.jpg)
The human Genome: Our complete set of genetic information Includes tens of thousands of genes Some genes do code for specific traits – ex:
blood type Mapping of Human genome……….started in
the 80’s…..finally finished in 2000.
Human Genes
![Page 15: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/15.jpg)
2 major genes determining blood type ABO and Rh
Rh – determined by a single gene with two alleles (+ and -)……Rh+ are homozygous dominant or heterozygous…..people who are homo recessive are Rh-
ABO blood groups are much more complex (3 alleles for this gene) IA, IB, and i. A and B are co-dominant – AB blood type IAIA, IAi, - A blood type – same scenario with B are type B Ii – are type O Negative and positive come from the Rh gene and letters
come from the ABO gene
Blood Group Genes
![Page 16: Human Heredity 14-1 BIO 1004 Flora. Scientists take pictures the complete set of chromosomes during cell division. They then place all of the chromosomes.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf701a28abf838c7d565/html5/thumbnails/16.jpg)