The female had the
genotype XHXh
, and produced the two gametes seen at the left side of the diagram. The male had the genotype XHY0, and produced the two gametes seen at the right side of the diagram.
What are the 3 genotypes?
Genotype is also used to refer to the pair of alleles present at a single locus. With alleles ‘A' and ‘a' there are three possible genotypes
AA, Aa and aa
.
What are the genotypes for gender?
The X and Y chromosomes, also known as the sex chromosomes, determine the biological sex of an individual: females inherit an X chromosome from the father for a XX genotype, while males inherit a Y chromosome from the father for
a XY genotype
(mothers only pass on X chromosomes).
What is a heterozygous female?
Heterozygous just means that
a person has two different versions of the gene
(one inherited from one parent, and the other from the other parent).
What is the difference between a male and a female genotype?
Key points: In humans and other mammals, biological sex is determined by a pair of sex chromosomes:
XY in males and XX in females
. Genes on the X chromosome are said to be X-linked. X-linked genes have distinctive inheritance patterns because they are present in different numbers in females (XX) and males (XY).
Is there a YY gender?
Males with
XYY syndrome have 47 chromosomes because of the extra Y chromosome. This condition is also sometimes called Jacob's syndrome, XYY karyotype, or YY syndrome. According to the National Institutes of Health, XYY syndrome occurs in 1 out of every 1,000 boys.
How many sexes are there?
Based on the sole criterion of production of reproductive cells, there are
two and only two sexes
: the female sex, capable of producing large gametes (ovules), and the male sex, which produces small gametes (spermatozoa).
What is AA genotype?
A
homozygous dominant
(AA) individual has a normal phenotype and no risk of abnormal offspring. A homozygous recessive individual has an abnormal phenotype and is guaranteed to pass the abnormal gene onto offspring.
Can ones genotype change?
Genotype generally remains constant from one environment to another
, although occasional spontaneous mutations may occur which cause it to change. However, when the same genotype is subjected to different environments, it can produce a wide range of phenotypes.
Can As marry AA?
Compatible genotypes for marriage are:
AA marries an AS
. You'll end up with kids with AA and AS which is good. But sometimes if you're not lucky all the kids will be AS which limits their choice of partner. AS and AS should not marry, there is every chance of having a child with SS.
Can females be Hemizygous?
Females are XX
. Males are XY. Since males have only a single copy of the X chromosome, they have only a single allele for any gene on the X chromosome. Males are said to be “hemizygous” for any X-chromosome genes, meaning that there are only half (“hemi”) as many alleles as normally present for a diploid individual.
Who has stronger genes mother or father?
Genetically, you actually
carry more of your mother's genes than your father's
. That's because of little organelles that live within your cells, the mitochondria, which you only receive from your mother.
How do you know if you are heterozygous?
If the two versions are different, you have a heterozygous genotype
for that gene
. For example, being heterozygous for hair color could mean you have one allele for red hair and one allele for brown hair. The relationship between the two alleles affects which traits are expressed.
What do all human males inherit from their mother?
In humans, females inherit an X chromosome from each parent, whereas males
always inherit their X chromosome from their mother
and their Y chromosome from their father.
Do females have more DNA than males?
The human genome
Men and women have practically the same set of about 20,000 genes. The only physical difference in their genetic make up is in the sex chromosomes. Only
males
have a Y chromosome. Although the X chromosome is present in both sexes, there are two copies in females and only one in males.
Can an XY female get pregnant?
Males and
most XY females cannot become pregnant because they don
‘t have a uterus. The uterus is where the fetus develops, and pregnancy isn't possible without it. In most cases, having a Y chromosome means having no uterus, so pregnancy isn't possible.
