TOMS OOMU MMS OMRDIES 
1 lo Nh we 1 14 56 1 IF 
INHERITANCE OF PATTERN BALDNESS (Chart 4) 
Generation I. I 1 is questionable. I 2 was very bald on the top and front of the head. 
I 3 had heavy hair and retained same to an advanced age. 
Generation II. II 1 had heavy hair. II 2 had normal hair but was probably a carrier. 
II 3 and II 4 were both bald. II 5 had very poor health and was much older than the 
other members of her family when baldness first appeared. II 6 and II 8 were twenty- 
five when they first became bald and show the same pattern as their mother. II 7 had 
heavy hair. II 9 had very thin hair and it is thought that later in life she became bald 
but nothing definite concerning it is known. II 10 is questionable. 
Generation III. III 1 was bald. III 2 and III 3 had heavy hair. III 4 is not known. 
III 5 was bald. III 6 had heavy hair. III 7 had thin hair. Nothing in reference to 
the hair is known about III 8. III 9 is slightly bald. III 10 has very thin hair and is 
evidently a carrier. III 11 died at an early age, as did also III 14. III 12 and III 13 
had heavy hair. III 15 and III 16 both were very bald and probably became so at the 
same age as their uncles. 
Generation IV. IV 1 had heavy hair as did alsoIV 3 and IV 4. IV 2 wasbald. IV 5 was 
not bald but the amount of hair is unknown. IV 6 and IV 7 had heavy hair. IV 8, 
IV 9, IV 12 and IV 13 all became bald at about twenty-five and show the same pattern 
as the maternal great-grandmother. IV 10 has recently become bald, the cause assigned 
being illness, but the real cause is probably heredity. Both IV 14 and IV 15 are still 
under twenty years of age. IV 16, IV 17 and IV 18 all have heavy hair. (Fig. 8.) 
TABLE [.—Inheritance in Men 
No. bald | No. not bald. 
Matings | No. matings Sons | 
Expectation Actual | Expectation | Actual 
BS bp.. .. 2 3 3 3 0 | 0 
BE Xbb... 5 13 Ne) 12 0 | 0 
1? 
BbX Bb 4 16 12 10 + | 
2? 
BBX Dba «, 20: 49 108 54 64 54 44 
cs ee pee 43 0 0 43 Ys 43 
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