| Question Answer | In humans, a male has one X chromosome and one Y chromosome | Human females produce egg cells that have one X chromosome | what is the approximate probability that a human offspring will be female? 50% | what percentage of human sperm cells carry an X chromosome? 50% |
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What is the probability that a human sperm cell will carry an Y chromosome?
Meiosis forms haploid gametes (sperm and egg cells). All eggs contain one X chromosome. 50% of sperm contain one X chromosome and
50% contain one Y chromosome
. During fertilisation , there is a 50% chance that a sperm containing an X chromosome will fuse with the egg; this would result in a baby girl – XX.
What is the probability that a human offspring will be female *?
The ratio of male to female child is 1:1, half will be girls and half will be boys. Hence the probability is
50%
for female offspring and 50% for male off spring.
What does a human female inherit?
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. … Here, females carry two X chromosomes (XX) and only produce gametes with X chromosomes.
What gamete determines gender of offspring?
Sex Chromosome
Egg cells all contain an X chromosome, while sperm cells contain an X or Y chromosome. This arrangement means that it is the
male
that determines the sex of the offspring when fertilization occurs.
Why the father of a girl who is colorblind must also be colorblind?
The ‘gene’ which causes (inherited, red and green types of) colour blindness is found only on the X chromosome. So, for a male to be colour blind the colour blindness ‘gene’ only has to appear on his X chromosome. For a female to be colour blind it must
be present on both of her X chromosomes
.
What represents a female in a pedigree?
In human genetics, pedigree diagrams are utilized to trace the inheritance of a specific trait, abnormality, or disease. A male is represented by a square or the symbol ♂, a female by a circle or
the symbol ♀
.
Can you be a girl with a XY chromosome?
The X and Y chromosomes are called “sex chromosomes” because they contribute to how a person’s sex develops. Most males have XY chromosomes and most women have XX chromosomes. But there are girls and women who have XY chromosomes. This can happen, for example, when a girl has androgen insensitivity syndrome.
How many chromosomes does a female inherit from her mother?
There are two kinds of sex chromosome, one called the X chromosome and one called the Y chromosome. Females normally have two X chromosomes (XX). A female inherits
one X chromosome
from her mother and one X chromosome from her father. Males normally have an X and a Y chromosome (XY).
How many sexes do humans have?
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).
How many genders are there?
The
four genders
are masculine, feminine, neuter and common. There are four different types of genders that apply to living and nonliving objects. Masculine gender: It is used to denote a male subtype.
Which parent is most responsible for determining the gender of a child?
Neither parent gets to decide. Almost everyone has around a 50% chance of having a boy and a 50% chance of having a girl. What we can say is that
dad’s sperm
determines whether a baby will be a boy or a girl. About half of his sperm will make a boy and half a girl.
What gender is color blindness most common in?
Since it’s passed down on the X chromosome, red-green color blindness is more common in
men
. This is because: Males have only 1 X chromosome, from their mother.
Can females ever be color blind?
Color blindness is an inherited condition. It’s commonly passed down from mother to son, but
it’s possible for females to be colorblind
, as well. There are many types of color blindness that can occur depending on which pigments of the eye are affected.
Can color blindness be cured?
There’s no cure for color blindness
that’s passed down in families, but most people find ways to adjust to it. Children with color blindness may need help with some classroom activities, and adults with color blindness may not be able to do certain jobs, like being a pilot or graphic designer.
Are circles male?
Pedigrees use a standardized set of symbols,
squares represent males
and circles represent females.
