Eye Color
Hair Line
The name of the gene pair that consists of a dominant and recessive allele, i.e. (Xx) will be a heterozygous allele. In this situation, the characteristics of the dominant characteristic will mask that of the recessive allele. People have have a heterozygous genotype may be carriers for diseases that reside on the recessive allele.
A cross between a homozygous recessive and an individual of unknown genotype is called a test cross.The homozygous recessive can only pass on a recessive allele to the offspring, and so any recessive in the other parent will show up in the phenotype (detectable characteristics) of some of the offspring.
Two genetic disorders are Turner's syndrome and cystic fibrosis.
name the genetic disorders
Test Cross
In eyes, it would be brown is dominant, and blue is recessive. Free earlobe allele is said to be dominant over the attached earlobe allele. When an organism has two dominant alleles for a trait, it is called homozygous dominant. Two recessive alleles for a trait is homozygous recessive.
Many different disorders are sex-linked. Saying something is sex-linked indicates that the gene causing the disorder can be found on one of the sex chromosomes, certain muscle disorders for example are sex-linked
Genetic disorders are not contagious because they are caused by changes in a person's DNA that are passed down from parents. They are not caused by germs, which are microorganisms like bacteria and viruses that can be transmitted from person to person.
Someone who has a gene for a recessive genetic disorder but does not exhibit the disorder is referred to as a "carrier." Carriers possess one copy of the mutated gene and one normal gene, which means they can pass the mutated gene to their offspring without showing symptoms of the disorder themselves.
Recessive
Homozygous dominant.
recessive