Principles of Biology Exam Ch 9, 10, 11

Ch 9, 10, 11

Random orientation of homologous chromosomes occurs during ________Blank of meiosis.

metaphase I

Independent assortment occurs during prophase I.

False

Synapsis and crossing-over occur

Tetrads are at spindle equator

Homologues separate

Dyads are at spindle equator

Sister chromatids separate

Haploid daughter nuclei are not genetically identical to parent cell

Diploid daughter nuclei are genetically identical to parent cell

At the end of meiosis II, there are

four haploid cells, with each chromosome consisting of a single chromatid.

In animal cells, cytokinesis is accomplished by the formation of a cleavage furrow.

True

Which of the following events occur during prophase I?

breakdown of the nuclear envelope, condensation of chromosomes, and movement of centrosomes

What is the overall purpose of meiosis?

to produce four genetically different haploid cells

Select all the disorders associated with sex-linked inheritance.

Duchenne muscular dystrophy, color vision deficiency, hemophilia, fragile X syndrome

GG

P- Green; G- Homozygous dominant

Gg

P- green; G- Heterozygous

gG

P- Green; G- Heterozygous

gg

P- Yellow; G- Homozygous Recessive

The _______genetic disorder called ________causes blue-purple-colored skin.

autosomal recessive; methemoglobinemia

The ______ genetic disorder called ______ causes defective collagen that leads to weakened, brittle bones.

autosomal dominant; osteogenesis imperfecta

The ______ genetic disorder called ________causes abnormally thick mucus in the bronchial tubes and pancreatic ducts.

autosomal recessive; cystic fibrosis

The _______ genetic disorder called _______ leads to progressive degeneration of neurons in the brain.

autosomal dominant; Huntington's disease

The _______ genetic disorder called ______ causes urine to be black.

autosomal recessive; alkaptonuria

The ______ genetic disorder called _______ causes irregularly shaped hemoglobin that leads to poor circulation.

autosomal recessive; sickle-cell disease

When conducting dihybrid crosses, it is assumed that the traits assort independently of one another. This is because they are on _____Blank chromosomes.

different

If an individual within the parental generation was heterozygous for both traits, what combinations of traits could their gametes possess?

WS, Ws, wS, and ws

In a pedigree for ______ ______