Color Blindness is inherited as a sex linked recessive. If a color blind woman marries a man with normal vision, what would you expect in their children? Show a cross
I put that X- x-
Xx x-
There would be a 0% chance that there offspring will have color blindness. There would be a 100% chance Thatcher offspring are carriers of color blindness.
The cross that I did was xx and XX.
x x
X Xx Xx
X Xx Xx
Zunie forgot that the male is XY, and the Y chromosome does not contain a color vision gene. Use a Punnett square.
https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
To determine the possible outcomes in their children, we need to consider the inheritance pattern of color blindness. Color blindness is a sex-linked recessive disorder, meaning it is carried on the X chromosome.
Let's assign the following labels for the chromosomes:
- X: Normal vision allele
- x: Color blindness allele
Based on the information given, we know that the woman is color blind, so her genotype would be Xx (one normal vision allele and one color blindness allele). The man, on the other hand, has normal vision, so his genotype would be xx (two normal vision alleles).
To predict the possible outcomes in their children, we need to combine the genetic material from both parents. Since the woman has one X chromosome with the dominant normal vision allele (X) and another X chromosome with the recessive color blindness allele (x), and the man has only one X chromosome with a normal vision allele (x), we can create a Punnett square to depict the potential combinations:
| Xx | Xx |
| -----------|-----------|
xx | Xx (normal)| Xx (normal)|
-----|-----------|-----------|
xx | Xx (normal)| Xx (normal)|
In the Punnett square, each box represents a possible combination of alleles in the offspring. Since both parents have at least one normal vision allele (X), the children will have at least a 50% chance of having normal vision as well. However, since the mother also carries the color blindness allele (x), there is a 50% chance that each child will inherit the color blindness allele.
Thus, the expected outcomes in their children would be:
- 50% chance of having normal vision (Xx)
- 50% chance of being color blind (xx)