Genetics Biology

A black rooster is crossed with a white hen, what are the possible genotypes and phenotypes of the offspring?

100% heterozygous speckled

If 2 F1 offspring from the above Parent cross are mated, what are the possible genotypes and phenotypes of the resultant F2 offspring?

25% homozygous black; 50% heterozygous speckled; 25% homozygous white

If the man in question is heterozygous for the Rh factor, what is the percentage chance of their child being Rh-?

50%

If a black hen was crossed with a black and white speckled rooster, what would be the genotype and phenotype of the offspring?

50% homozygous black; 50% heterozygous speckled

The woman in the example above marries a man without color blindness. They want to have children. Which of the following is true?

50% of sons will be color blind

A pair of wavy-haired dogs like the labradoodles breed, what would be the most likely combination of phenotypes of the puppies?

A quarter would have curly hair; half would have wavy hair; a quarter would have straight hair

Diane's father needs a blood transfusion. Who can be a donor?

Jack's father

If a straight haired dog was bred with a curly haired dog, the puppies would:

all would have wavy hair

A woman who is Rh- marries a man who is Rh+. During pregnancy she needs to:

avoid alcohol and drugs eat a balanced diet get moderate exercise take a rhogam shot so her body doesn't reject the baby

A black-feathered chicken was crossed with a white-feathered chicken. The result is a black-and-white-speckled chicken. This is an example of:

codominance

However, there are four possible blood types (phenotypes) for A/B blood: type A, type B, type AB, and type O. It can be deduced from this that the A and B alleles are an example of:

codominance

Blood type in humans can be described genetically as: (choose all correct answers)

codominance complete dominance multiple alleles polygenic inheritance

Two people with type-A blood marry. Each of their fathers has type-o blood. Jack's mom has type-AB blood and Diane's mother has type-A blood. They have a child with type-O blood. The relationship between the A allele and O allele is most likely a case of ______________.

complete dominance

A woman's father and son are both color blind. She in not. She is an example of:

genetic disease carrier

However, a black-and-white speckled chicken would be:

heterozygous

This means that a black chicken would be _____________ for that trait.

homozygous

Rh + is completely dominant to Rh-. A person who is Rh- must be __________.

homozygous recessive

When a dog has two curly alleles (KCKC), it has a very curly coat, such as on the poodle. A dog with two straight alleles (K+K+) has a straight coat like in labs. Dogs that are heterozygous (K+KC) have an intermediate or wavy coat like the labradoodle. This is an example of _________________________.

incomplete dominance

A man named Billy shows up claiming to be Jack's long-lost brother. He claims his mother and Jack's father had an affair in college. His blood type is B. We don't know his mom's blood type. This claim is most likely ______________.

inconclusive

In humans, there are 3 alleles for blood type: A, B, and o. This is an example of:

multiple alleles

A person who is Rh + must be__________.

need more information

Blood type in humans is also characterized by the Rh factor. We can be either + or - for Rh. This combined with A/B type means that blood type is considered a case of:

polygenic inheritance

The Rh factor was first discovered in:

rhesus monkeys

Who gets color blindness? As many as 8 percent of men and 0.5 percent of women with Northern European ancestry have the common form of red-green color blindness. This is an example of:

sex-linked traits