Explain what determines the sex of the offspring at the mome

Explain what determines the sex of the offspring at the moment of conception in humans: Explain why many genes on the X chromosome in males will be expressed regardless of their dominance status: Estimate the ratio of males to females produced when a clutch of turtle eggs is incubated at 28.5 degree C:

Solution

Explain what determines the sex of the offspring at the moment conception in humans

the sex of the offspring at the moment conception in humans is determined by sex chromosome of male gamete (sperm cell) is carrying

sperm cell

Egg cell

offspring

Y   chromosome

X     chromosome

male

X     chromosome

X     chromosome

female

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3 answer

Because males are heterogametic in nature , they lack complementary alleles for many genes on the x chromosome

===================================================================================4 question

Estimate the ratio of males to female produced when a clutch of turtle eggs is incubated at 28 c

Answer =male/female= 1:0

Only male hatchlings emerged from eggs incubated at 28 °C

only females emerged from eggs incubated at 32.5 °C

sperm cell	Egg cell	offspring
Y   chromosome	X     chromosome	male
X     chromosome	X     chromosome	female