Genetics 2

Chromatin is known as.....

• the unreplicated threads in the nucleus

• replicated chromosomes

• chromosomes during anaphase

• chromosomes during metaphase

chromosomes are made up of.....

• chromatids joined in the middle by a centriole

• centrioles joined by chromatids

• chromatids joined in the middle by a centromere

• centromeres joined by a centriole

A gene is ......

• an allele

• an alternate form a gene

• a karyotype

• a section of a chromosome

An allele is ....

• a homologous pair

• a heterozygous pair

• an alternate form of a gene

• a karyotype

Dominant alleles...

• always appear in the phenotype

• never appear in the phenotype

• are masked by recessive alleles

• are always passed on to offspring

Recessive alleles

• will only appear in phenotype when in a heterozygous form

• will be masked by other recessive alleles

• never get inherited

• will only appear in phenotype when in a homozygous form

The phenotype is referring to the ....

• genetic makeup of an offspring

• the appearance of their genes

• the appearance of their physical makeup

• genes

Genotype is referring to .....

• The gene pair inherited from parents

• The characteristics which appear

• The genes in the gametes

• The gene mutation

A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?

• 100% BB
• 75% BB and 25%Bb
• 50 % BB and 50% Bb
• 50% Bb and 50% bb

Squidward has light blue skin, and his genotype for this trait is Bb. Which of the following would describe Squidward?

• Purebred

• Hybrid

• Homozygous

• Sex-linked