A:
monohybrid cross
describes the mating is organisms that have different homozygous alleles for a single trait.
Which term describes an organism that is identical alleles for a trait?
Which term describes an organism that has identical alleles for a trait?
homozygous
.
What do we mean when we use the term Dihybrid cross?
A dihybrid cross involves
organisms that are heterozygous for two characters
and a monohybrid cross involves only one. A dihybrid cross involves organisms that are heterozygous for two characters and a monohybrid cross involves only one.
Which allele combination represents a female?
X-linked alleles require a specific notation: X
c
or X
+
where the “+” represents the dominant allele and the lowercase letter the recessive allele. Females will have
two X-linked alleles
(because females are XX), whereas males will only have one X-linked allele (because males are XY).
Which of the following describes an organism that has 2 different alleles for a trait?
An organism which has two different alleles of the gene is called
heterozygous
.
Are alleles DNA?
An allele is
a variant form of a gene
. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Alleles can also refer to minor DNA sequence variations between alleles that do not necessarily influence the gene's phenotype. …
What is the difference between heterozygous and homozygous individuals?
A homozygous individual can carry either a dominant or a
recessive
allele while a heterozygous individual possesses both dominant and recessive alleles. A Homozygous individual produces one type of gamete while a heterozygous individual makes two kinds of gametes.
Which allele combination represents a male?
Answer:
XrY
is the allele combination which represents a male who has an X-linked recessive disorder.
Which combination of alleles are always involved?
The combination of alleles that an organism carries constitutes
its genotype
. If the paired alleles are the same, the organism's genotype is said to be homozygous for that trait; if they are different, the organism's genotype is heterozygous.
What is genotype for a recessive trait found on the female chromosome?
The genotype for a recessive trait found on the female is
XH
.
Is FF heterozygous or homozygous?
| Genotype Phenotype | F F Homozygous dominant No cystic fibrosis (Normal) | F f Heterozygous Carrier (has no symptoms but carries the recessive allele) | f f Homozygous recessive Cystic fibrosis (has symptoms) |
|---|
Are blue eyes homozygous or heterozygous?
We all have two alleles, or versions, of each gene. Being homozygous for a particular gene means you inherited two identical versions. It's the opposite of a heterozygous genotype, where the alleles are different. People who have recessive traits, like blue eyes or red hair,
are always homozygous for that gene
.
When two alleles of a particular gene are the same?
If the two alleles are the same, the individual is
homozygous
for that gene. If the alleles are different, the individual is heterozygous.
Do all genes have 2 alleles?
Genes can have two or more possible alleles.
Individual humans have two alleles
, or versions, of every gene. Because humans have two gene variants for each gene, we are known as diploid organisms. The greater the number of potential alleles, the more diversity in a given heritable trait.
What is the difference between alleles and genes?
A gene is a unit of hereditary information. Except in some viruses, genes are made up of DNA, a complex molecule that codes genetic information for the transmission of inherited traits. Alleles are also genetic sequences, and they
too code for
the transmission of traits.
