What does it mean if a trait is 'sex-linked'?
Why are males more likely to be affected by recessive sex-linked disorders?
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?
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?
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?
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?
Select all genotypes that represent Type O blood.
Select all genotypes that represent Type AB blood.
