Chapter 5: Chromosome and Inheritance (homework)

Albinism is a recessive disorder in which the skin and hair fail to produce pigment. The following question(s) ask you to evaluate the pedigree chart shown here in which "N" is the allele for normal pigmentation and "n" is the allele for albinism. The shaded circles for Deirdre and Shannon represent the only individuals expressing the disorder.

1/2

Albinism is a recessive disorder in which the skin and hair fail to produce pigment. The following question ask you to evaluate the following pedigree chart in which "N" is the allele for normal pigmentation and "n" is the allele for albinism. The shaded circles for Deirdre and Shannon represent the only individuals expressing the disorder.

Albino

The following F1 cross is made: BBGg × Bbgg. Which is not a possible outcome in the F2 generation?

BbGG

How could an embryonic stem cell be used to repair a severed spine?

Embryonic stem cells can grow into any other cell type, including a nerve cell.

Imagine that five hypothetical genes are arranged on a chromosome in the following order: G--H--I--J--K. Which two genes are most likely to have a crossover occur between them?

G and K

Albinism is a recessive disorder in which the skin and hair fail to produce pigment. The following question(s) ask you to evaluate the pedigree chart shown here in which "N" is the allele for normal pigmentation and "n" is the allele for albinism. The shaded circles for Deirdre and Shannon represent the only individuals expressing the disorder.

NN orNn

Albinism is a recessive disorder in which the skin and hair fail to produce pigment. The following question(s) ask you to evaluate the pedigree chart shown here in which "N" is the allele for normal pigmentation and "n" is the allele for albinism. The shaded circles for Deirdre and Shannon represent the only individuals expressing the disorder.

Nn

Fur color in rabbits is controlled by multiple alleles. What does this mean?

Rabbit fur color is controlled by a single gene, but there are multiple versions of that gene

The inheritance pattern for red-green color blindness is different for males compared to females. Red-green color blindness is much more common in males than in females. What does this suggest about the gene for red-green color blindness

The gene for this trait is located on the X chromosome.

Define Mendel's law of independent assortment.

The inheritance of one character has no effect on the inheritance of another character.

What do we call a genetic cross that follows two separate characters, such as pea seed color and pea seed shape?

a dihybrid cross

Part complete Albinism is a recessive disorder in which the skin and hair fail to produce pigment. The following question(s) ask you to evaluate the pedigree chart shown here in which "N" is the allele for normal pigmentation and "n" is the allele for albinism. The shaded circles for Deirdre and Shannon represent the only individuals expressing the disorder.

all of the above

Sickle-cell disease is caused by a recessive form of hemoglobin. Two parents that do NOT have the disease give birth to a child that does. What are the genotypes of the mother and father for the hemoglobin gene?

both parents are heterozygous

Recessive disorders related to genes found on the X chromosome but not on the Y are more commonly expressed in ________.

males