three or more forms of a gene that code for a single trait
are one of the 23 pairs of chromosomes in each body cell.
what do sex chromosomes carry and what it is determined on?
sex chromosomes carry genes that deterine wheather a person is male or female. They also carry genes that determine other traits
Genes on the x and y chromosomes
a person who has one recessive allele for a trait and one domoniant allele.
What are a persons characeristics are determined by?
they are determined by an interaction between genes and the enviornment
what are the the blood types?
A, B, AB, O
For colored blindness what does a square symbolize and what does a circle symbolize?
when a square or circle is colored in all the way what does it mean?
it means they have the desease.
when the circle is colered in half way what does it mean?
it mean the girl is a carrier
What are human traits determined by?
some human traits are determined by single genes with mulpitabl alleles but others still are determined by many genes that act together.
how is blood type inherited?
from your parents
an abnormal condition that a person inherits through genes or chromosomes.
what are genetic disorders caused by?
they are caused by mutations in the dna of genes. Other disders are causes by changes in the overall structer or number of chromosomes
what are the 4 common gentic disorders
cystic fibrosis hemophilia
sickle cell disease down syndrome
a chart or family tree that tracks which members of a family have a particular trait
what does a sickle celled dease look like
well the red boold cell is not like a disk any more it looks like a sickled shape
Do scientist use a pedigree?, if so how?
Yes, geneticists use a pedigree to trace the inheritance of traits in a human
is a picture of all the chomosomes in the cell
besides Pedigrees, today what can docters use to help diagnose genetic disorders
docters can use karyotypes to help diagonose genetic disorders
what are three methods for developing organisms with desirable traits
The process of selecting organisms with desired traits to be parents of the next generation
2 individuals that have simillar charaistics
2 genetically diffrent inviduals are crossed
an organiskm that has exactly the same genes as the organism from which it was produced
what is the genetic engineering
genes from one organism are transfered into the dna of another organism
inserting working copies of a gene directly into a person's cells
all the dna in one cell of an organism
what is the human geome project
it identify the dna sequence of every gene in a human geome
A Human trait that is controlled by a single gene with mulpiple alleles is
a hair type
c. blood type
d skin color
c. blood type
a sec- linked disorder is
a cystic fibrosis
c down syndrome
d sickle-celled disease
which of the following would most likely be used to diagnose down syndrome
c a punnet square
Explain why there are a wide variety of phenotypes for skin color in humans
there are mulpiple genes that can control the skin color
Traits controlled by reciessive alleles on the x chromosomes are more common in males than females. explain why?
males only have one x and females have two xs. If the sex linkeddisorder comes through on a chromosome men dont have another x chromosome to counter blanance it so they get this disorder.
what is a sickle-cell disease? how is this disorder inherited
sickle-cell diease is when the red blood cell is in a sickle shape because if oxegen concintrations are low in your body. it is inherited from being passed down from both parents. it is a recevie gentic disorder