Science - Chapter 5: Grade 7

One of the 23 pairs of chromosomes in the human, contains genes that will determine the sex of the individual.

Genes located on the sex chromosomes. Their alleles are passed from parent to child on a sex chromosome

a person who has one recessive allele for a trait and one dominant allele

An abnormal condition that a person inherits through genes or chromosomes

A chart or "family tree" that tracks which members of a family have a particular trait

a picture of all the chromosomes in a person's cell

The process of selecting a few organisms with desired traits to serve as parents of the next generation

involves crossing two individuals that have similar desirable characteristics

crossing two genetically different individuals

an organism that has exactly the same genes as the organism from which it was produced

genes from one organism are transferred into the DNA of another organism

inserting copies of a gene directly into a person's cells

The mutation in our genes only happens to one gene in dogs

people think that genetically engineered crops may not be safe. They fear these crops may harm the environment or cause health problems in humans.

Medical care, education, and job training

A genetic disorder in which the body produces abnormally thick mucus in the lungs and intestines

Caused by a mutation that affects hemoglobin. The red blood cells of people with this disease have a sickle or crescent shape. The sickle-shape blood cells can’t carry as much oxygen as normal cells

a genetic disorder in which a person's blood clots very slowly or not at all

a person's cells have an extra copy of chromosome 21

It is a sex-linked disorder, and the trait is on the x chromosome

Clone