At what stage in the life history of a mammal is the sex of an individual set?

Assessment: JAMB UTME - Biology - 2010 Subject: Biology

Question 1 Report

At what stage in the life history of a mammal is the sex of an individual set?
Answer Details
The stage in the life history of a mammal at which the sex of an individual is set is "at conception" (as stated in). The sex of a mammal, like other animals, is determined by the chromosomes inherited from its parents. Female mammals have two X chromosomes (XX), while male mammals have one X and one Y chromosome (XY). The sex of the individual is determined at the moment of fertilization, when the sperm from the male parent (which carries either an X or a Y chromosome) fuses with the egg from the female parent (which always carries an X chromosome) to form a zygote. Therefore, the sex of an individual mammal is determined at conception, before birth or any other stages in the life history of the mammal. Puberty and adolescence are stages in the life history of a mammal where sexual characteristics become more apparent, but the sex of the individual has already been determined at conception.
Read lesson note on Linkage, Sex Determination And Sex Linked Characters (WAEC)
View Answer

Related Questions

1

If both parents are heterozygous for a trait, the probability that an offspring will be recessive for that trait is
2

Use the diagram above to answer this question. Which of the following is a true feature of plantation ll?
3

Use the diagram above to answer this question. The movement of material in the xylem and phloem tissues of the plant are represented by the arrows labelled
4

In the diagram, which of the animals represents the oldest creatures in terms of evolutionary history?
5

Use the diagram above to answer this question. With respect to their decreasing dependence on aquatic conditions for reproduction, which of the following is ...
6

Use the diagram above to answer this question. In which plantation are all the trees between the height of 2-4m?
7

Use the diagram above to answer this question. Based on the shape and structure of the beak and feet, the bird represented is likely to feed mainly on
8

Use the diagram above to answer this question. During photosynthesis, the arrow labelled ll represents the

Download The App On Google Playstore

Everything you need to excel in your exams

Green Bridge CBT Mobile App
Personalized AI Learning Chat Assistant
200,000+ Exam Questions Across IGCSE, JAMB, WAEC & NECO
Over 3,900 Lesson Notes
Offline Support - Learn Anytime, Anywhere
Green Bridge Timetable
Literature Summaries & Potential Questions
Track Your Performance & Progress
In-depth Explanations for Comprehensive Learning