chapter 9 Flashcards
(19 cards)
The closer two genes are on a chromosome:
the less likely they will cross over
Mendel’s First Law is known as the Law of:
Segregation
In flowering plants, the carpel produces
the egg cell
The term ‘true-breeding’ means that:
when a plant is self-fertilized, offspring always look like the parents
In a monohybrid cross:
the parents are different for only one traiT
In X-linked disorders in humans:
more males than females are affected
An organism’s phenotype refers to:
the expressed traits of an organism
Which one of the following statements about dihybrid crosses is true?
they formed the basis for Mendel’s Second Law
In Mendel’s Second Law, all different possible combinations of alleles are possible if:
alleles sort independently from one another
A Punnett square allows us to predict the probabilities of:
the genotypes and phenotypes of the offspring
A gene-linkage map tells us:
the relative distance between genes on a chromosome
In a monohybrid cross, a homozygous recessive individual is crossed with a heterozygous individual. The outcome will always be:
a 1:1 ratio
In an autosomal recessive disorder, which individuals have the disorder?
homozygous recessive
Which one of the following genetic disorders is NOT autosomal recessive?
Neurofibromatosis
In incomplete dominance, what clue tells you that the trait is controlled by a pair of alleles?
observing all phenotypes in the F2 generation
ABO blood types in humans are the result of:
multiple alleles for the trait
Multifactorial traits:
are controlled by polygenes
Which one of the following is an example of pleiotropy?
Marfan’s syndrome
The first gene linked to a specific chromosome was:
white eyes in fruit flies
