11645237
Description
Flashcards by lily bevan, updated more than 1 year ago
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Created by lily bevan
almost 7 years ago
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| Question | Answer |
| What is pair 23? | Sex chromosomes. |
| What are the differences in pair 23 for male and females? | Males have XY Females have XX |
| Which chromosome does each gamete carry? | Sperm carry a Y chromosome. Eggs carry an X chromosome. |
| What is the chance of having a boy? | 50% |
| When does the male embryo's testes start to develop? | @ 6 weeks |
| What causes the growth of the male testes? | the SRY gene. |
| what do testes produce? | Male sex hormones called androgens. |
| What do androgens cause? | They cause the embryo to develop male characteristics. |
| What happens if no male sex hormone is present? | The embryo develops female characteristics ( ovaries, clitoris, and vagina) |
| What are hormones? | A group of proteins that control many processes in cells. |
| How do hormones reach their target cells? | Through the blood stream. |
| What happened if a person produces androgen but their cells don't respond? | They have androgen insensitivity syndrome, meaning they appear female but have small internal testes and short vagina. |
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