Which allele combination represents a female with a heterozygous sex-linked trait?
Which allele combination represents a female who has a heterozygous sex-linked trait? Heterozygous means 2 different alleles can be only Tt with T being expressed unless codominance.In the sex cell where X comes from female Y or X can be from man..Hence the allele due to it being heterozygous hence it is XY
How are alleles for sex-linked traits inherited?
How are the alleles for sex-linked traits inherited? They are passed from the Y chromosome in parents to the X chromosome in offspring. They are passed from the X chromosome in parents to the XY chromosome in offspring.
How are alleles passed from parents to offspring?
Alleles are passed from the parents' sex chromosomes to the sex chromosomes in the offspring. Which symbol is used to label a male that expresses a sex-linked disorder on a pedigree?
How many alleles will females have?
Drosophila males lack a second allele copy on the Y chromosome; their genotype can only be XWY or XwY. In contrast, females have two allele copies of this gene and can be XWXW, XWXw, or XwXw.
What is genotype for a recessive trait found on the female chromosome quizlet?
What is genotype for a recessive trait found on the female chromosome? Hemophilia is an X-linked recessive disorder (Xh) that is passed through generations and can be traced by using a pedigree.
Which allele combination represents a homozygous dominant individual?
An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example, this genotype is written BB. An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. In our example, this genotype is written Bb.
What is the probability that a female offspring of the cross that is shown above would have a recessive allele for Duchenne muscular dystrophy disorder quizlet?
Each son born to a woman with a dystrophin mutation on one of her two X chromosomes has a 50 percent chance of inheriting the flawed gene and having DMD. Each of her daughters has a 50 percent chance of inheriting the mutation and being a carrier.
What is the genotype for a recessive trait?
Only individuals with an aa genotype will express a recessive trait; therefore, offspring must receive one recessive allele from each parent to exhibit a recessive trait.
What trait is hemophilia?
Hemophilia is a sex-linked recessive disorder. The abnormal gene responsible for hemophilia is carried on the X chromosome. Males have one X chromosome and one Y chromosome.
Which allele combination represents a male?
X-linked alleles require a specific notation: Xc or X+ where the “+” represents the dominant allele and the lowercase letter the recessive allele. Females will have two X-linked alleles (because females are XX), whereas males will only have one X-linked allele (because males are XY).
Is AA heterozygous or homozygous?
If an organism has two copies of the same allele, for example AA or aa, it is homozygous for that trait. If the organism has one copy of two different alleles, for example Aa, it is heterozygous. Keep in mind that an organism can't simply be 'homozygous,' period.
Is YY homozygous or heterozygous?
Homozygous HeterozygousLaw of DominanceHomozygousHeterozygousGenotypeYYYyPhenotypeyellowyellow
What is the genotype of the female fruit fly?
Since the female fly has a yellow body, and the tan body color is the dominant allele, she will be homozygous recessive for yellow body color. Therefore, the female fly will be homozygous for both traits. The genotype is Xw+y Xw+y.
What are the phenotypic ratios of a white eyed female is crossed with a red-eyed male?
Surprisingly, this cross yielded a 1:1:1:1 ratio of red-eyed females to white-eyed females to red-eyed males to white-eyed males.
Can females have Duchenne muscular dystrophy?
Duchenne muscular dystrophy usually affects males. However, females are also affected in rare instances. Approximately 8% of female Duchenne muscular dystrophy (DMD) carriers are manifesting carriers and have muscle weakness to some extent.
How are alleles for sex-linked traits inherited?
How are the alleles for sex-linked traits inherited? They are passed from the Y chromosome in parents to the X chromosome in offspring. They are passed from the X chromosome in parents to the XY chromosome in offspring. They are passed from parents to offspring on the X and Y chromosomes.
What is homozygous allele?
homozygous alleles. alleles that are carried on X and Y chromosomes. alleles that are carried on all chromosomes except the X and Y chromosomes. Click card to see definition 👆. Tap card to see definition 👆. alleles that are carried on X and Y chromosomes. Click again to see term 👆. Tap again to see term 👆. Nice work!
Do boys have Y chromosomes?
Fathers always determine the gender of the offspring in humans. Males never have Y chromosomes.
