Sophia Human Biology Milestone 6 Questions with Answers
Sophia Human Biology Milestone 6 Questions with Answers
1
Bert has blonde hair (b). Molly has
... [Show More] brown hair (B), but her genotype is Bb, meaning she carries a recessive blonde allele.
What is the likelihood of Bert and Molly's second child having brown hair?
25%
75%
50%
100%
CONCEPT
Punnett Squares
2
Which of the following does DNA replication produce?
One molecule with extra DNA, causing the nucleus to divide
New DNA only
Two molecules, each of which is half new and half old DNA
New RNA only
CONCEPT
DNA Replication
3
A father has red-green colorblindness, his wife does not, nor is she a carrier.
What are the odds that their daughter is a carrier for red-green colorblindness?
50%
25%
0%
100%
CONCEPT
X-Linked Traits
4
Using specially designed bacteria to clean up environmentally hazardous radioactive waste would be an example of __________.
bioremediation
gene therapy
sequencing
a polymerase chain reaction
CONCEPT
DNA Technology and Research
5
Sometimes a trait can be influenced by multiple genes.
What would such a trait be called?
Pleiotropy
Penetrance
Multifactorial trait
Polygenic trait
CONCEPT
Polygenic Traits and Pleiotropy
6
Which of these is true about a clone?
It is a white blood cell infected by a virus.
It is a type of cancerous stem cell.
It is a genetic copy of a cell.
It is a hybrid version of two different cell types.
CONCEPT
DNA Technology and Research
7
Mark and Michelle both have dark hair, which is a dominant trait. But their first child is blonde.
Which is the most likely explanation?
Another gene caused the alleles for brown hair to deactivate.
One of the two has a blonde allele that is dominant in the child.
Both parents have a recessive blonde allele that got passed on to their child.
It's not possible--Mark can't be the real father.
CONCEPT
Punnett Squares
8
Which of the following is a gene abnormality in which two nonhomologous parts rearrange and fuse together?
Translocation
None of these
Deletion
Duplication
CONCEPT
Chromosome Structure Changes
9
Which of the following statements is FALSE?
RNA has ribose sugar in its nucleotide while DNA has deoxyribose sugar.
There are three types of DNA: mDNA, tDNA and rDNA.
RNA has uracil as one of its nitrogen bases while DNA does not.
RNA is single-stranded while DNA is double-stranded.
CONCEPT
Protein Synthesis, Part 2: Translation
10
Which of these is responsible for the occurrence of disjunction?
Duplication of genetic material
Separation of homologous chromosomes
Exchange of genetic material
Fusion of homologous chromosomes
CONCEPT
Meiosis and Genetic Variability
11
What is an allele that isn't expressed called?
Dominant allele
Genotype
Phenotype
Recessive allele
CONCEPT
Heredity
12
What is the pinched region called where two sister chromatids are joined together?
Chromosome
Centriole
Centrosome
Centromere
CONCEPT
Mitosis
13
Which phase of mitosis follows prophase?
Interphase
Anaphase
Telophase
Metaphase
CONCEPT
Mitosis
14
Which of the following is true for homologous chromosomes?
We receive both from one parent.
They contain different sets of genes, and are different lengths and shapes.
We receive two from each parent.
They contain the same set of genes, and are the same length and shape.
We receive one from each parent.
They contain the same set of genes, and are the same length and shape.
We receive one from each parent.
They contain different sets of genes, and are different lengths and shapes.
CONCEPT
Structure of DNA and Chromosomes
15
What has to occur for a person to inherit an autosomal recessive trait?
One parent must contribute a recessive allele.
One parent must contribute a recessive allele while the other contributes a dominant allele.
Both parents must contribute dominant alleles.
Both parents must contribute recessive alleles.
CONCEPT
Autosomal Recessive Traits and Disorders [Show Less]