Cell Biology Module 10: Genes and Inheritance

______ is what is seen or measured when alleles are expressed

phenotype

______ is the combination of alleles for a particular gene

genotype

A ____ is a variation in physical appearance of heritable characteristics

trait

what is the law of dominance?

alleles are dominant or recessive

what is the law independent assortment?

alleles for each gene are inherited randomly

what is the law of segregation?

alleles are separated during gamete formation

_____ are used to trace the inheritance of alleles in humans

pedigrees

In autosomal dominant disorders, males and females are ____ affected

equally

In dominant disorders, the disorder is/is not in every generation

IS

In recessive disorders, the disorder ____ generations

skips

____-_____ traits are traits for genes that are located on the X or Y chromosome

sex linked

Males pass on their __ chromosomes to their sons

Y

males pass on their __ chromosomes to their daughter

X

Color blindness is an __ linked recessive trait

X

In an X-linked recessive disorder, all of the ____ of an affected male will inherit a copy of the disease allele

daughters

X-linked recessive disorders ___ a generation

skips

____ ____ is when neither allele is fully dominant, so heterozygotes express a phenotype in between the two

incomplete dominance

human hair texture exhibits an example of _____ _____

incomplete dominance

______ traits are traits with a wide variety of phenotype possibilities

quantitative

what is an example of a quantitative trait?

skin color

____ genes are genes on the same chromosome and are typically inherited togeter

linked

What is the only way that alleles split up of linked genes?

crossing over

what are the genes of hair color and eye color?

OCA2

HERC2

which chromosome is hair color and eye color located on?

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