Full Answer
Which combination of alleles best describes a sex-linked trait?
Which combination of alleles best describes a sex-linked trait? heterozygous alleles homozygous alleles alleles that are carried on X and Y chromosomes alleles that are carried on somatic cells alleles that are carried on X and Y chromosomes How are sex-linked traits inherited?
What is the sex of an allele that is heterozygous?
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 What is the probability that a female child of Charles and Marie would suffer from hemophilia?
How are sex-linked traits inherited?
alleles that are carried on X and Y chromosomes How are sex-linked traits inherited? Alleles are passed from the parents' sex chromosomes to nonsex chromosomes in the offspring. Alleles are passed from the parents' nonsex chromosomes to the sex chromosomes in the offspring.
How are alleles passed from parents to offspring?
Alleles are passed from the parents' sex chromosomes to nonsex chromosomes in the offspring. Alleles are passed from the parents' nonsex chromosomes to the sex chromosomes in the offspring. Alleles are passed from the parents' sex chromosomes to the sex chromosomes in the offspring.
Which allele combination represents a female who is heterozygous?
All of the female offspring acquire a dominant W allele from the father and a recessive w allele from the mother, and are therefore heterozygous dominant with red eye color.
What is the allele combination for a female?
Females have two X chromosomes (XX), while males have one X chromosome and one Y chromosome (XY). This means females have two alleles for X-linked genes while males only have one.
How are the alleles for sex linked traits inherited?
Sex-linked diseases are passed down through families through one of the X or Y chromosomes. X and Y are sex chromosomes. Dominant inheritance occurs when an abnormal gene from one parent causes disease, even though the matching gene from the other parent is normal. The abnormal gene dominates.
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.
Is HH homozygous or heterozygous?
Individuals with dominant phenotypes can be either homozygous (HH) or heterozygous (Hh).
Is the genotype HH is homozygous?
whereas one with two different forms (Hh) is called heterozygous (a heterozygote) - also called a hybrid. The terms genotype and phenotype are different sorts of descriptions for organisms in genetics. A genotype describes an organism in terms of its combination of genes.
What are the heterozygous genotypes?
A heterozygous genotype is a genotype that has multiple different alleles present in that gene. For example, a genotype that is "Tt" would be heterozygous, where the capital "T" could represent the trait of "tall" and the lowercase "t" could represent the trait of short.
Are males heterozygous or homozygous?
So a female can be considered homozygous or heterozygous about a specific trait on the X chromosome. Men are a little more confusing. They inherit two different sex chromosomes: X and Y. Because these two chromosomes are different, the terms “homozygous” and “heterozygous” don't apply to these two chromosomes on men.
What are sex linked genes?
Sex linkage applies to genes that are located on the sex chromosomes. These genes are considered sex-linked because their expression and inheritance patterns differ between males and females. While sex linkage is not the same as genetic linkage, sex-linked genes can be genetically linked (see bottom of page).
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).
What is the probability that the daughter of an unaffected father and a mother who is a carrier for the DMD gene will have DMD?
Each daughter has a 50% chance of being a carrier like Sarah. As you can see, each son has a 50% chance of having DMD. You can also see that each daughter has a 50% chance of having DMD and a 50% chance of being a carrier!
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.
How many chromosomes does a female have?
In humans, females have two sex chromosomes (XX) and a heterozygous individual shows presence of different or alternative alleles for a trait. Therefore, a female showing heterozygous sex-linked trait will show XRXr as one of its X chromosome carries wild type allele (R), while another X chromosome carries mutated (r) allele.
Is XRXR homozygous or heterozygous?
The answer is XRXr. X and X is female, so it wouldn't be the first two answers because those have Y. RR or rr is homozygous because they're the same alleles (two big R's or two little r's), and Rr is heterozygous because they're different alleles (one big R and one little r).
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.