Taylor Brooke Chaney
Chapter 12: Complex Inheritance – Study Guide
Genetics Q&A: Complexities of human genetics, from sex to depression
TYPE IN YOUR ANSWERS USING A DIFFERENT COLOR!
60 points total converted to 100 point scale in gradebook.
Complete and submit via Ch. 12 Dropbox
Sex organs: ovaries in females, testes in males.
A class of sex hormones, including testosterone, that are present in men and cause male-
associated traits like deep voice, growth of facial hair, and defined musculature.
A class of sex hormones, including estradiol, that are higher in women than in men and
support female sexual development and function.
Paired chromosomes present in both males and females; all chromosomes except the X and Y
Paired chromosomes that differ between males and females. Females have XX, and
males have XY
A phenotype determined by an allele on an X chromosome.
A visual representation of the occurrence of phenotypes across generations.
The comparison of sequences on the Y chromosomes of different
individuals to examine paternity and paternal ancestry.
A form of inheritance in which heterozygotes have a phenotype that is
intermediate between the two homozygotes
A form of inheritance in which the effects of both alleles are displayed in the phenotype of
Variation in a population showing an unbroken range of phenotypes rather
than discrete categories
A trait whose phenotype is determined by the interaction among alleles of more than
An interaction between genes and the environment that contributes to
a phenotype or trait
An abnormal number of one or more chromosomes (either extra or missing copies)
The failure of chromosomes to separate accurately during cell division; nondisjunction
in meiosis leads to aneuploid gametes
Having an extra copy of chromosome 21; also known as Down syndrome
A procedure that removes fluid surrounding the fetus to obtain and analyze the
chromosomal makeup of fetal cells
The chromosomal makeup of cells. Karyotype analysis can be used to detect chromosomal
Answer. (33 points total)
Explain how sex is determined by chromosomes in human children. (1)
Sex chromosomes are X and Y (pair 23)
and they determine an organisms gender. Depending on whether the organism is XX or XY will determine if it
is a male or female.