BSC 2005 – Flashcards

The Pea Plant

involves 2 divisions and produces 4 non-identical daughter nuclei

You have quantified the amount of DNA in a cell and noticed that it has doubled in the span of a couple of hours; the amount of protein has remained constant. What stage of the cell cycle is this cell in?

All of the following occur during mitosis except ______?

Crossing over between sister chromatids does not result in recombination of genetic material while crossing over between non-sister chromatids does because_____?

depicting a diploid cell with four chromosomes in what stage of cell division?

replicated forms of chromosomes joined together by the centromere and separated during mitosis and meiosis II

contain the same genes, but possibly different versions (alleles) of those genes.

An organisms phenotype refers to the _________, while the genotype refers to the __________.

there is at least a 50% probability that his children will inherit the disease

If an individual is homozygous for a particular trait, he _________

The black and white alleles are codominant

True because A and B are the dominant blood type alleles, and both individuals could carry a type O allele.

Two hamsters, both with short, black hair, have the following offspring: 10 short, black hair; 4 long, black hair; 3 short, white hair; 1 long, white hair. What are the genotypes of the original two hamsters

ATP Synthase

Results in separation of sister chromatids into daughter chromosomes

A man with type O blood is searching for his biological father. His mother has type A blood. His father could have what blood type?

A female is diagnosed with an X-linked recessive disorder, What must be true?

Uracil is a base found only in?

A way to increase DNA

An isolated molecule from a eukaryotic cell and determined that it is made up of nucleotides, it is double stranded and it contains thymine. The molecule must be?

DNA replication makes use of ________, which refer to the hydrogen bonds formed between adenine-thymine and cytosine-guanine in DNA molecules

The DNA base sequence TTGCGA on the parent strand would code for what sequence on the new synthesized strand of DNA

If a trait tends to skip a generation before it appears again in a pedigree, and it occurs about equally often in males and females, what is its most likely pattern of inheritance?

Following meiosis I, the daughter cells are _____; following meiosis II the daughter cells are ______; and following mitosis the daughter cells are ______.

If a species normally has 46 chromosomes, then how many cells produced from meosis will it have?

Transcription and Translation

Down syndrome is a condition in which a person has three copies of chromosome 21 instead of the standard two copies, this is likely due to?

This process would stop if all the ribosomes were inactivated in a cell

Prokaryotic cells require protein, and thus contain ribosomes, and the organelles responsible for protein production. What would prokaryotic cells also contain?

A three-base sequence of mRNA that codes for a specific amino acid

A women who is planning to become pregnant is concerned about her exposure to environmental mutagens that may have caused DNA mutations. For the mutations to become heritable the must affect _____?

Alternative splicing is a means by which?

The type of cell division that results in the production of gametes

Human sperm and egg cells contain one set of chromosomes, and therefore are _____?

When a sperm and egg fuse during fertilization, the resulting zygote contains two sets of chromosomes and therefore is a ____ cell

After birth, the newborn will continue to grow and develop into an adult as it cells go through ____?