CELL-205-M001: HUMAN BIOLOGY -
EXAM 1 - BYUIS NEWEST
QUESTIONS AND CORRECT
DETAILED ANSWERS
Genotype - ✔✔✔ Correct Answer > An organism's genetic makeup,
or allele combinations. Homozygous recessive (pp), homozygous
dominant (PP), and heterozygous (Pp) examples
Heterozygous - ✔✔✔ Correct Answer > having two different alleles
for a trait
Homozygous dominant - ✔✔✔ Correct Answer > Both alleles
(factors) for a trait are the same and dominant (AA)
Homozygous recessive - ✔✔✔ Correct Answer > Both alleles
(factors) for a trait are the same and recessive (aa)
Page 1 of 28
,Incomplete dominance - ✔✔✔ Correct Answer > Blending of
phenotypic traits of parent. Mom curly hair. Dad straight hair. Child
wavy hair
Phenotype - ✔✔✔ Correct Answer > An organism's physical or
functional traits. Ex: skin shade, body shape, blood type. Can be
influenced by both genetics and environment
Polygenic Inheritance - ✔✔✔ Correct Answer > Phenotype is
dependent on multiple genes
Punnett square - ✔✔✔ Correct Answer > diagram showing the gene
combinations that might result from a genetic cross
Recessive allele - ✔✔✔ Correct Answer > An allele that is masked
when a dominant allele is present
Sex-influenced trait - ✔✔✔ Correct Answer > a trait that is
influenced by the presence of male or female sex hormones
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, Sex-linked trait - ✔✔✔ Correct Answer > Traits controlled by genes
located on sex chromosomes.
X-linked trait - ✔✔✔ Correct Answer > a trait whose gene is carried
on the X chromosome
Afterbirth - ✔✔✔ Correct Answer > The placenta, membranes of the
amniotic sac, part of the umbilical cord, and some tissues from the
lining of the uterus that are delivered after the birth of the baby.
Allantois - ✔✔✔ Correct Answer > The allantois is an extra-
embryonic membrane that forms part of umbilical cord
Amnion - ✔✔✔ Correct Answer > Membrane that encloses the
embryo in protective amniotic fluid. Cushion
Blastocyst - ✔✔✔ Correct Answer > A hollow ball of cells
comprising of 1) outer sphere trophoblasts 2) hollow central cavity 3)
group of cells (ICM). Formed when morula goes into the uterus day 4
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EXAM 1 - BYUIS NEWEST
QUESTIONS AND CORRECT
DETAILED ANSWERS
Genotype - ✔✔✔ Correct Answer > An organism's genetic makeup,
or allele combinations. Homozygous recessive (pp), homozygous
dominant (PP), and heterozygous (Pp) examples
Heterozygous - ✔✔✔ Correct Answer > having two different alleles
for a trait
Homozygous dominant - ✔✔✔ Correct Answer > Both alleles
(factors) for a trait are the same and dominant (AA)
Homozygous recessive - ✔✔✔ Correct Answer > Both alleles
(factors) for a trait are the same and recessive (aa)
Page 1 of 28
,Incomplete dominance - ✔✔✔ Correct Answer > Blending of
phenotypic traits of parent. Mom curly hair. Dad straight hair. Child
wavy hair
Phenotype - ✔✔✔ Correct Answer > An organism's physical or
functional traits. Ex: skin shade, body shape, blood type. Can be
influenced by both genetics and environment
Polygenic Inheritance - ✔✔✔ Correct Answer > Phenotype is
dependent on multiple genes
Punnett square - ✔✔✔ Correct Answer > diagram showing the gene
combinations that might result from a genetic cross
Recessive allele - ✔✔✔ Correct Answer > An allele that is masked
when a dominant allele is present
Sex-influenced trait - ✔✔✔ Correct Answer > a trait that is
influenced by the presence of male or female sex hormones
Page 2 of 28
, Sex-linked trait - ✔✔✔ Correct Answer > Traits controlled by genes
located on sex chromosomes.
X-linked trait - ✔✔✔ Correct Answer > a trait whose gene is carried
on the X chromosome
Afterbirth - ✔✔✔ Correct Answer > The placenta, membranes of the
amniotic sac, part of the umbilical cord, and some tissues from the
lining of the uterus that are delivered after the birth of the baby.
Allantois - ✔✔✔ Correct Answer > The allantois is an extra-
embryonic membrane that forms part of umbilical cord
Amnion - ✔✔✔ Correct Answer > Membrane that encloses the
embryo in protective amniotic fluid. Cushion
Blastocyst - ✔✔✔ Correct Answer > A hollow ball of cells
comprising of 1) outer sphere trophoblasts 2) hollow central cavity 3)
group of cells (ICM). Formed when morula goes into the uterus day 4
Page 3 of 28
