Unit 8 Flashcards
________ are a pair of genes which are located at the same place on homologous chromosomes.
Gametes
Alleles
Punnetts
Offspring
Alleles
The specific region of a chromosome which can determine the development of a specific trait.
phenotype
gene
allele
DNA
gene
In mammals the females are represented by having two X chromosomes (XX) and the males by having an X and Y chromosome (XY). Based on a Punnett Square, what percentage will be males and what percentage will be females?
25% male, 75% female
50% male, 50% female
75% male, 25% female
100% female
50% male, 50% female
In order to set up a Punnett Square, what will be the genetic makeup of the gametes produced by a bull that is homozygous for black (BB) coat color and heterozygous for the polled (Pp) condition?
bP, BP, bp, Bp
BB, Pp, BB, Pp
bP, bp
BP, Bp
BP, Bp
Assuming that the gene controlling black fur color in rabbits is recessive (w) and white fur color is dominant (W), what percentage of the offspring will be phenotypically white when a homozygous, black male (ww) is mated to a heterozygous white female (Ww)?
50% white, 50% black
100% black
25% black, 75% white
100% white
50% white, 50% black
_______ are a pair of genes which are located at the same place on homologous chromosomes.
gametes
alleles
alleles
True or False?
Genotype is the genetic constitution (makeup) of an individual.
True
When plants with red flowers are crossed with plants with white flowers the seeds from this cross produce plants with pink flowers. This is an example of _________
pair alleles
incomplete dominance
recessive inheritance
sex-linked
incomplete dominance
True or False?
A specific region of a chromosome capable of determining the development of a specific trait is recessive.
False
True or False?
Economically, important traits in livestock are controlled by one or two alleles.
False
An animal that carries a gene with two different alleles is said to be ____________.
heterozygous
homozygous
dihybrid
bipolar
heterozygus
True or False?
A Punnett Square is a diagram used to predict an outcome of a particular cross or breeding experiment.
True
Wet ear wax is an example of a _______ gene because it causes traits in multiple areas of the body.
Polygenic
Singlegenic
Pleiotropic
Pleiotropic
______ means two different versions of a gene were given. For example. Ww.
Heterozygous
Twozygous
Polyzygous
Homozygous
Heterozygous
Diploid means ____ sets of chromosomes.
1
2
4
3
2
