What is the genotype of the red eyed male fly?
Homozygous dominant for the red encoding allele – genotype: XWXW; phenotype: red eyes. Heterozygous – genotype XWXw; phenotype: red eyes. Homozygous recessive with two white encoding alleles – genotype XwXw; phenotype white eyes.
Can a male fruit fly be heterozygous for eye color?
The only way an offspring can have white eyes, is if it inherited a recessive allele from both parents. The gene for eye color in fruit flies is actually sex-linked on the X-chromosome. Only females can be homozygous or heterozygous for red eye color. The males have only one allele for eye color on their X-chromosomes.
What percentage of male offspring are red eyes?
Step 5: One out of four (25% of) offspring will be both inale, and have red eyes.
What is the genotype of the male?
Most people have either two X chromosomes (genotypic female) or an X and a Y chromosome (genotypic male).
What is the genotype for a hemophiliac male?
A female carrier of hemophilia x A male The male had the genotype XHY0, and produced the two gametes seen at the right side of the diagram. The genotypes seen in the center of the square represent the possible genotypes of the F1 generation. Two female offspring are produced for every two male offspring.
Can males carry hemophilia?
A male can have hemophilia if he inherits an affected X chromosome (an X chromosome with a mutation in the gene that causes hemophilia) from his mother.
Can males be carriers?
Men cannot be carriers because they only have one X chromosome. The Y chromosome is not a really homologous chromosome. For this reason, the genetic make-up of the observed trait is not twofold.
What genes are inherited from father?
Sons can only inherit a Y chromosome from dad, which means all traits that are only found on the Y chromosome come from dad, not mom. Background: All men inherit a Y chromosome from their father, and all fathers pass down a Y chromosome to their sons. Because of this, Y-linked traits follow a clear paternal lineage.
What is a carrier male?
= A carrier is an individual who carries and is capable of passing on a genetic mutation associated with a disease and may or may not display disease symptoms. Carriers are associated with diseases inherited as recessive traits.
Is it possible to be a carrier of a dominant gene?
A carrier is a person who has a disease trait, but does not have any physical symptoms of the disease. A carrier has a gene mutation on the recessive gene. The dominant gene outweighs the recessive gene, so while a carrier does not develop the disease, a carrier can pass on the gene with a mutation to his or her child.
What does it mean if you are a carrier of Covid 19?
“An asymptomatic carrier is someone who has contracted the virus, but who isn’t showing any symptoms of the disease,” says Bartley. “There have been instances where a person has tested positive for SARs-CoV-2 (COVID-19), but show no symptoms for the entire course of the disease.”