|
Which allele combination represents a female who is a carrier for an X-linked recessive disorder? |
XRXr |
|
Which pedigree symbol is used to represent a female carrier of a recessive X-linked trait? mc020-1.jpg mc020-2.jpg mc020-3.jpg mc020-4.jpg |
B |
|
Drosophila eye color is an X-linked trait. Red eye color is dominant, and white eye color is recessive. Which Punnett square shows the probability that 100 percent of offspring will have red eyes? mc007-1.jpg mc007-2.jpg mc007-3.jpg mc007-4.jpg |
A |
|
Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. Cats that have coats that are a patchwork of black and orange are called tortoiseshell cats, are typically female, and have genes that code for both black fur (Xo) and orange fur (XO) located on the X chromosomes. Y chromosomes do not code for color in tortoiseshell cats. A female cat that has only orange fur (XOXO) is crossed with a male cat that has only black fur (XoY). mc013-1.jpg How many of the offspring will exhibit tortoiseshell coloring? |
2 in 4 |
|
Which allele combination represents a female who has a heterozygous sex-linked trait? |
XRXr |
|
Hemophilia is an X-linked recessive disorder (Xh) that is passed through generations and can be traced by using a pedigree. mc019-1.jpg Based on the pedigree that is shown, which describes John? |
does not have hemophilia |
|
What is genotype for a recessive trait found on the female chromosome? |
Xh |
|
Which symbol is used to label a male that expresses a sex-linked disorder on a pedigree? mc022-1.jpg mc022-2.jpg mc022-3.jpg mc022-4.jpg |
D |
|
Which is not considered a sex-linked trait? |
purple flower color in pea plants |
|
What was Thomas Hunt Morgan’s main contribution to science? |
He discovered that certain traits were linked to the X chromosome. |
|
Which combination of alleles best describes a sex-linked trait? |
alleles that are carried on X and Y chromosomes |
|
How are sex-linked traits inherited? |
Alleles are passed from the parents’ sex chromosomes to the sex chromosomes in the offspring. |
|
Duchenne muscular dystrophy is an X-linked recessive disorder. mc009-1.jpg 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? |
… |
|
Hemophilia is an X-linked recessive disorder (Xh) that is passed through generations and can be traced by using a pedigree. mc018-1.jpg What is the probability that a female child of Charles and Marie would suffer from hemophilia? |
0 percent |
|
Which statement about inheritance is true? |
Fathers always determine the gender of the offspring in humans. |
Share This
Flashcard
