What does it mean if a trait is 'sex-linked'?
Why are males more likely to be affected by recessive sex-linked disorders?
Which chromosome typically carries sex-linked traits in humans?
Inheritance of sex-linked traits is most evident in which sex?
If a carrier mother has a son, what is the chance he will express a sex-linked trait?
Duchene muscular dystrophy is a sex linked trait. A not having this disease is dominant (N) to having this disease (n). A mother who is a carrier for this disease (XNXn) mates with a father that is not affected (XNY) in the cross below.
Based on the Punnett square for the sex linked trait, of males will be affected, and of the females will be affected.
In a Punnett square for hemophilia, what does the genotype XNXn indicate about a female?
Important Note
BB and Bb males = bald
bb males = non bald.
Bb and bb females = non bald. BB females = bald
In cats, coat color is codominant AND it is an X-linked trait. Meaning coat color is ONLY carried in the X chromosome.
Possible genotypes and phenotypes for females and males are shown in the table below.
Which table shows the expected phenotypes of offsprings resulting from a cross between a Female Calico cat and a Male Orange cat?
Select all genotypes that represent Type B blood.
The ABO blood group has several alleles, so why does each person only have two of them?
A father is heterozygous for his type IBi blood (BO) and the mother has type ii (OO) blood.
What are the possible blood types of babies born from this couple?
In pigs, fur color is codominant. When a pig is heterozygous, it is brown with white spots.
If a pig with brown fur (BB) mates with a pig with white fur (WW), what are the phenotypes of the offspring?
Hydrangeas are beautiful shrubs that grow in a variety of forms. Many hydrangeas originally hail from Asia and there are some natives in the Americas as well as shown below.
Hydrangeas with the genotype HBHB are blue. Those with the genotype HYHY are yellow. Others with the genotype HBHY have a combination of the blue and yellow flowers.
Based on the information about the hydrangeas, which statement is true?
In plants known as "four o' clocks", the allele for the dominant red flower color is Incompletely Dominant over the allele for white flowers. A gardener wants to determine which of the following Punnett squares shows a cross between a heterozygous pink-flower plant and another heterozygous pink-flowered plant.
A model of the color patterns in rabbits is shown below.
Which Punnett square will produce a 50% spotted and a 50% white coat rabbits?
In a species of birds, blue feathers (FB) are incompletely dominant to the gene for white feathers (FW). Individuals that are heterozygous (FBFW) have blue-tipped feathers.
A bird with blue-tipped feathers is crossed with a white bird. Complete the sentences below for the predicted outcome of offspring produced.
The blue-tipped feathers genotype is and the white bird genotype is .
When these two fruits are crossed, will be blue-tipped, and will be white.
Body color for horses is determined by two Incompletely dominant alleles: brown (BB) and cream (BC). When a horse is heterozygous for body color, it is described as palomino (BBBC).
What is the expected phenotypic ratio if two palomino horses mate?
Which Punnett square shows a 25% chance of the son having hemophilia?
Which Punnett square shows a 50% chance of the daughter being a carrier for hemophilia?
A woman who is a carrier (XBXb)) for Baldness mates with a man who is Bald (XbY), a recessive disease.
What percentage of their offspring will be carriers for baldness?
Show your work.
A woman who is a carrier (XBXb) for baldness mates with a man who is bald (XbY), a recessive disease.
What percentage of their offspring will be bald?
Show your work.
Select all genotypes that represent Type O blood.
Select all genotypes that represent Type AB blood.
